Along with many other inventions we still see today. (Used with permission from Climate Central.). Since the beginning of the Industrial Revolution, people have burned more and more fossil fuels and changed vast areas of land from forests to farmland. Climate Reality Leadership Corps trainings bring together people from around the globe who are ready to make a difference. A human contribution of greater than 100% is possible because natural climate change associated with volcanoes and solar activity would most likely have resulted in a slight cooling over the past 50 years, offsetting some of the warming associated with human activities. This page was archived on 18 Nov 2020 with reason: Content is outdated This page has been archived. We believe that together, we can create a world where we rapidly transition away from fossil fuels to end the climate crisis, safeguard our health, strengthen our communities’ well-being, and ensure justice for those who have been marginalized in the past. But let’s dive into the details. Text STOP to opt out. This extra carbon dioxide (and other GHGs like methane) traps more and more heat in our atmosphere. The 2018 US National Climate Assessment—whose authors include 300 leading scientists and thirteen federal government agencies—concludes that “it is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. This graph documents carbon dioxide levels since roughly 800,000 years ago. 3. We use cookies to improve your experience. Text "SCIENCE" to 662266 or sign up online. Scientists call this δ13C (pronounced "delta C thirteen"), and it’s a smoking gun. Warmer temperatures aren’t the only fingerprint humans have left on our changing planet. Well, when humans burn fossil fuels, it’s as if we’re wrapping another, not-so-natural blanket around the Earth. However, none of them sufficiently explain the recent, dramatic increase in global temperatures. In other words, there’s a strong correlation between more carbon dioxide and higher temperatures. Published Jul 14, 2009 These changes to the climate generally evolved over long periods of time, shifting from ice age to interglacial period and back again. Human-driven changes in land use and land cover such as deforestation, urbanization, and shifts in vegetation patterns also alter the climate, resulting in changes to the reflectivity of the Earth surface (albedo), emissions from burning forests, urban heat island effects and changes in … Another way to think of these gases is as a natural blanket — keeping the Earth about 60 degrees Fahrenheit (about 30 degrees Celsius) warmer than it would be normally. Without this effect, the average temperature would be about – 18°C (well below the freezing point of water), rather than its current 14°C. Scientists and climate policy wonks usually say global warming is caused by “human activities.” This shorthand obscures an important point: while we humans are certainly responsible for climate change on some level, just a few of us – particularly in industry and government – … (617) 547-5552. Updated Jan 21, 2021. US electricity infrastructure is aging, inadequate, and vulnerable. Receive the latest on the movement for climate solutions from Climate Reality. Some of the gases (such as carbon dioxide and nitrous oxide) will last for more than a century. Here's how. Perhaps the biggest one has been the soaring consumption of dirty fossil fuel energy around the globe. A time history of atmospheric carbon dioxide (credit: Andy Jacobson, CIRES/NOAA) We produce greenhouse gases in lots of different ways: 1. How Do We Know that Humans Are the Major Cause of Global Warming? Basically, it was a time of profound transformation. The science provides differing amounts of evidence linking different forms of extreme weather to climate change. The election is over, but the crises are all still here. Urge the Senate to require employers follow science-based protections for workers and their communities. And we know that humans are burning fossil fuels, releasing huge amounts of carbon pollution and trapping more and more heat in the atmosphere. Tell Uber & Lyft to be part of a clean transportation future. Sign up or text "SCIENCE" to 662266. Cows and sheep produce large amounts of methane when they digest their food. As the concentration of CO2 and other heat-trapping gases in the atmosphere rises, the Earth warms up. That’s why things are heating up and the climate is changing. © Union of Concerned Scientists Fossil fuels — like oil, natural gas, and coal — “contain carbon that’s been locked away from the natural cycle for eons.” When we burn these fossil fuels, the carbon combines with oxygen to make carbon dioxide. In fact, Earth has recently undergone unprecedented warming, particularly since the 1950s. Unlike fossil fuels, renewables don’t add greenhouse gases to our atmosphere. Human activity is the main cause of climate change. Climate change is fueling wildfires. We know that CO2 warms the world, that CO2 concentrations are at record-breaking levels, and that global temperatures are rising. Analysis of these trends strongly suggests that without the emissions from burning coal and oil, it is very unlikely that 13 out of the 15 warmest years on record would have occurred either on their own or in such quick succession. Global fossil fuel consumption since 1800. It also will continue to degrade ecosystems and natural resources, affecting food and water availability and human health, further burdening economies and societies. Natural “climate drivers” include the energy from the sun; aerosols from periodic volcanic eruptions, dust, and salt spray; natural ecological phenomena like methane-emitting termite mounds and CO2 uptake by plants; and variations in snow and ice cover that change how much the Earth’s surface reflects the sun’s energy back into space (referred to as albedo). The energy choices we make today could make or break our ability to fight climate change. Current global warming trends cannot be explained by natural forcing alone. Even if some don't believe human activity is the primary cause, most Americans do believe it contributes at least somewhat to climate change. For the first time, researchers have developed a mathematical equation to describe the impact of human activity on the earth, finding people are causing the climate to change … As the concentration of carbon dioxide in our atmosphere has increased since the Industrial Revolution, global temperatures have also steadily increased. The concentration of CO2 in the Earth’s atmosphere has increased dramatically over the last 150 years, from a pre-industrial era concentration of approximately 280 parts per million (ppm) to more than 410 ppm currently. Climate change has always happened on Earth, which is clearly seen in the geological record; it is the rapid rate and the magnitude of climate change occurring now that is of great concern worldwide. Our transportation system is outdated and broken—and it needs to change. And it means fighting for equity and environmental justice for all. In recent years, the global climate movement—and young people in particular—have been demanding we do even better. Cutting down forests (deforestation). They’re better for our planet and our health. Here’s what we know. Cause And Change, And How Humans Cause Climate Change 967 Words | 4 Pages. More people means more demand for oil, gas, coal and other fuels mined or drilled from below the Earth’s surface that, when burned, spew enough carbon dioxide (CO2) into … We know that warming and cooling have happened in the past, long before humans were around. There’s only one conclusion: humans are the primary reason we see our climate changing today. For example, in a landmark 2004 paper, researchers determined that climate change had at least doubled the risk of occurrence of the record-breaking 2003 European summer heat wave, which resulted in the deaths of tens of thousands of people. We are a 501(c)(3) nonprofit organization. Solar Output We're arming the new administration with facts, evidence, and science. The coal-powered steam engine, internal-combustion engine, radio, automobile, and airplane were all born in or from technology developed in this period. Humans cause climate change by releasing carbon dioxide and other greenhouse gases into the air. Human activities contribute to climate change by causing changes in Earth’s atmosphere in the amounts of greenhouse gas - es, aerosols (small particles), and cloudiness. More recently, scientists have found that fingerprinting of climate change can be detected in global daily weather patterns since 2012 and yearly patterns since 1999. Every single year since 1977 has been warmer than the 20th century average. We are a nonprofit organization that believes there is hope in unity, and that together, we can build a safe, sustainable future. It’s clear that we need to make the switch to clean, reliable sources of renewable energy like solar and wind. By continuing, you accept our use of cookies. Greenhouse gases are released into the air, where they persist for a … Before the Industrial Revolution, about 80 percent of the world’s population were rural farmers. The COVID-19 emergency has shattered our sense of normalcy and forced us to grapple with the kind of world we want – and need – when this crisis is over. It looks at the following theories; Fossil Fuel Theory, Agricultural Theory, Deforestation Theory. Carbon dioxide (CO2) is the heat-trapping gas in our atmosphere responsible for most of the warming measured over the past several decades. Each of the last 3 decades has been successively warmer than any preceding decade since 1850(1). Scientists know that the warming climate is caused by human activities because: They understand how heat-trapping gases like carbon dioxide work in the atmosphere They know why those gases are increasing in the atmosphere Over the last 50 years, human activities – particularly the burning of fossil fuels – have released sufficient quantities of carbon dioxide and other greenhouse gases to trap additional heat in the lower atmosphere and affect the global climate. This information tells scientists that human-caused fossil fuel emissions have been the main contributor to the rise in CO2 concentrations since the pre-industrial era. These gases accumulate in the atmosphere, blocking heat from escaping, and they don't respond to the temperature changes (the greenhouse effect). A blog on science, politics, and activism. Please enable javascript for the optimal experience! Chemical analysis of the atmospheric CO2 that reveals the increase is coming from burning fossil … Democracy and science can be powerful partners for the public good—and both are under attack. Climate change, the periodic modification of Earth’s climate caused by atmospheric changes and the atmosphere’s interactions with geologic, chemical, biological, and geographic factors. Tell President Biden: It is time for bold action on nuclear weapons. 1. Within the scientific community, there is essentially no disagreement on the causes of climate change. Sea levels are risin… A 2016 study of the same heat wave concluded that human-caused climate change had increased the risk of heat-related mortality during the event by about 70 percent in central Paris and about 20 percent in London. Similarly, researchers found that the record-breaking precipitation Texas experienced in 2017 during Hurricane Harvey was made three times more likely and 15 percent more intense by climate change. The period of 2015 to 2019 included the top five hottest years on record. So when they are cut down, that beneficial effect is lost and the carbon stored in the trees is released into the atmosphere, adding to the greenhouse effect. Our running list of attacks on science—disappearing data, silenced scientists, and other assaults on scientific integrity and science-based policy—provides a representative sample of threats to the federal scientific enterprise. Image courtesy of Dr. John Cook. How do human activities contribute to climate change and how do they compare with natural influences? In fact, studies show that human activity is responsible for more than half of the warming observed since 1951. Msg & data rates may apply. amount of carbon dioxide in our atmosphere has gone up and down over time It means battling the disinformation spread by fossil fuel companies and other wealthy interests. Major scientific assessments also agree. This ancient, or paleoclimate, evidence reveals that current warming is occurring roughly ten times faster than the average rate of ice-age-recovery warming. Burning coal, oil and gas produces carbon dioxide and nitrous oxide. We’re simply adding more carbon dioxide into our world than it can absorb. Humans cause climate change because an overwhelming scientific consensus thinks this way, the specific form of carbon dioxide is increasing due to human activity, more greenhouse gases are being released, and the average temperature of Earth is increasing. Multiple studies have shown that at least 97 percent of scientists agree that global warming is happening and that human activity is the primary cause. In recent years, the field of attribution science has become more sophisticated, and scientists are now able to quantify how much more likely an extreme event—such as a heat wave or a massive downpour—was as a result of human-caused climate change. Help protect workers from dangerous heat. Download it today! CO2 concentration levels are unlikely to dip below these annual averages for hundreds of years. Certain gases in the atmosphere block heat from escaping. Human-caused global climate change is primarily due to the release, through our activities, of greenhouse gases. The Paris Agreement of 2015 called on nations to keep global warming under the dangerous threshold of 2°C, aiming for 1.5°C. The US continues to keep intercontinental ballistic missiles on high alert—creating the risk of a mistaken nuclear war in response to a false warning. 3. The amount of carbon dioxide in the atmosphere has a strong correlation with rising temperatures. Specifically, the evidence shows that certain heat-trapping gases, such as carbon dioxide, are warming the world—and that we release those gases when we burn fossil fuels like coal, oil, and gas. The Earth’s atmosphere acts like a transparent blanket, letting in light but trapping some of the heat it g… As scientific models and methods grow more sophisticated, and as we collect more data, our confidence in human-caused climate change only grows higher. Greenhouse gases from human activities are the most significant driver of observed climate change since the mid-20 th century. Scientists agree that today’s warming is primarily caused by humans putting too much carbon in the atmosphere, like when we choose to extract and burn coal, oil, and gas, or cut down and burn forests. Climate science encompasses a range of disciplines, from oceanography and meteorology, to chemistry, physics, biology and computer science. With the right policies, practices, vision and cooperation, acting boldly now will give us the best chance of creating the safe and promising future the youth of the world deserve. It is extremely likely that human activities, especially emissions of greenhouse gases, are the dominant cause of the observed warming since the mid-20th century. But with aggressive measures to reduce future emissions and adapt to those climate impacts we cannot avoid, we have a small window to avoid the worst climate change harms and build a better world. What does that mean? This evidence has led organizations like the IPCC to conclude that the effects of heat-trapping gases and other human activities are both detectable throughout the climate system and “extremely likely to have been the dominant cause of the observed warming since the mid-20th century.”. Taken from data compiled by the National Oceanic and Atmospheric Administration and Scripps Institution of Oceanography. Sounds like greenhouse gases are great. Some human activities increase the greenhouse gases in the atmosphere: Burning fossil fuels, eg coal, gas and oil - these release carbon dioxide into the atmosphere. But when the models also include human-induced climate drivers, they accurately capture recent temperature increases in the atmosphere and in the oceans. In fact, measurements from ancient ice cores show that CO2 is now at its highest levels in over 800,000 years. Starting around the 1760s, there's a dramatic upward spike that's attributed to the Industrial Revolution. <<. 4. Humans cause climate change. Climate Reality Leadership Corps trainings. Humans started harnessing fossil fuels on a massive scale during the Industrial Revolution. In brief, it carries a specific ratio of carbon isotopes that is only found in the atmosphere when coal, oil, or gas is burned. How do we know? Clean energy investments can help. Nineteen of the 20 warmest years have occurred since 2001. Today, there is more carbon dioxide in the atmosphere than there ever has been in at least the past 800,000 years. When energy from the sun is reflected off the earth and back into space (mostly by clouds and ice), or when the earth’s atmosphere releases energy, the planet cools So, what’s the problem? These fingerprints are found in a diverse range of records from the atmosphere, the ocean, and Earth’s surface. It’s released during cement manufacturing and when coal, gas, and oil are burned—something humans started doing a great deal of during the Industrial Revolution through to today. Extreme weather events can compound many of these health threats. The changing environment is expected to cause more heat stress, an increase in waterborne diseases, poor air quality, and diseases transmitted by insects and rodents. 2 Brattle Square, Cambridge MA 02138, USA, Infographic: Wildfires and Climate Change, Building Equitable, Clean, and Climate-Safe Infrastructure, How Soil Erosion Threatens Food and Farms. Burning fossil fuels produces carbon dioxide, a greenhouse gas. You can learn more about solar, wind, and geothermal in our free, downloadable e-book How Renewables Work: A Practical Guide. Burning fossil fuels– Fossil fuels such as oil, gas, and coal contain carbon dioxide t… We’re seeing more extreme weather events like hurricanes and wildfires, and the world’s glaciers and sea ice are melting. Our intensive (and free!) Without naturally-occurring greenhouse gases (GHGs) like carbon dioxide, our planet would be downright freezing. Get the Facts: Why Are Sea Levels Rising? Trees help to regulate the climate by absorbing CO2 from the atmosphere. Grappling with climate change requires transforming how we power our economy, and no sector requires more fundamental change than transportation, which accounts for the largest share of US global warming pollution. Industrial processes (pollution from factories, product production, etc.) Not too cold. All Rights Reserved. Numerous studies and surveys confirm that scientists agree: humans cause climate change. Today’s climate change is driven by human activities. We are a 501(c)(3) nonprofit organization. Just right. Because even with the threat of coronavirus outside our doors, we are still working to give our children a better world to live in. But how do we know for certain that humans are the cause? We cannot avoid some level of warming caused by the heat-trapping gases already present in the atmosphere. ©2021 The Climate Reality Project. No purchase necessary. By comparing the observed and modeled patterns, scientists can positively identify "human fingerprints” and attribute a proportion of observed warming to human activities. We know that carbon dioxide (and other greenhouse gases) trap heat in the Earth’s atmosphere. At the time of the industrial revolution, humans released around 3 billion tonnes of CO2e per year. Since industrialization, the human hand in forcing the climate has become evident. When natural and human-induced climate drivers are compared to one another, the human influences are so large that they crowd out other climate drivers over the past half century, producing the warming that we’re all experiencing. The ‘natural’ greenhouse effect makes life as we know it possible on Earth. ‘Forcings’ that change the climate Scientists have gathered evidence and have improved their methods for … Loosely defined, climate is the average weather at a distinct place that incorporates temperature, precipitation, and … But in the guide, we offer up facts and facts alone. HelpCenter FAQ. In the last 130 years, the world has warmed by approximately 0.85oC. Unmitigated climate change will lead to increases in extreme weather events and will cause significant sea level rise, causing property damage and population displacement. 2. Scientists agree that global warming is caused mainly by human activity. Our oceans have become more acidic. The causes of climate change can be any combination of: Internal variability in the climate system, when various components of the climate system—like the atmosphere and ocean—vary on … During the 20th and 21st century, the level of carbon dioxide rose by 40%. Carbon dioxide from human activity is increasing more than 250 times faster than it did from natural sources after the last Ice Age. Few Americans — just 1 in 10 — say humans do … Several authoritative scientific institutions and government agencies have confirmed both the rigor and the validity of attributing individual extreme events to human-caused climate change. This also makes sense from the known causes. Thanks to Big Polluters, there’s a lot of misinformation out there about these types of energy. called climate change. Generally speaking, scientists working on climate change compare the climate patterns they observe with patterns developed using sophisticated models of Earth's systems (such as the atmosphere and ocean). They’re the most dangerous invention the world has ever seen. There are many “natural” and “anthropogenic” (human-induced) factors that contribute to climate change. The idea that humans could change the planet's climate may be counter-intuitive, but the basic science is well understood. Human activities are not the only ones that can impact climate, however, and throughout Earth's history natural activities have also caused climate fluctuations (see references 3). The Union of Concerned Scientists is actively monitoring the coronavirus pandemic and its implications for scientific integrity. Increasing livestock farming. The revolution saw an incredible explosion in innovation. They include rising levels of carbon dioxide, unprecedented warming, and a distinct atomic signature left behind in the atmosphere when fossil fuels are burned. We need to grow a resilient food system from the ground up. Who’s anti-blanket, anyway? Put simply, here’s what we know for sure: That’s the short of it. Greenhouse gas emission is a major human causes of climate change, and their sources include transportation, electricity production, burning fossil fuel in industries, commercial and re… The answer is in the science. This time period totally transformed our world and the way humans live, but it’s also had big consequences. For the warming over the last century, there is no convincing alternative explanation supported by the extent of the observational evidence.”, Similarly, an authoritative 2014 report by the Intergovernmental Panel on Climate Change, written and reviewed by hundreds of climate experts and scientists from countries around the world, states unambiguously: “Human influence on the climate system is clear, and recent anthropogenic emissions of green-house gases are the highest in history. The largest known contribution comes from the burning of fossil fuels, which releases carbon dioxide gas to the atmosphere. And that’s just the tip of the iceberg. This includes mountain glaciers, ice sheets … >>Related: What Is the Greenhouse Effect? This lesson aims to get students to think about the human causes behind climate change. They let sunshine in and trap some of its heat in our atmosphere, making life on Earth possible today. Call on Congress to prioritize science-based election reforms. When the delicate balance of these GHGs is maintained between what we add and what plants absorb, the long-term average works out like Goldilocks and the Three Bears for life: Not too hot. While some types of events are more readily attributable to global warming than others, attribution science is becoming increasingly robust. Terms and conditions. Scientists attribute the global warming trend observed since the mid-20 th century to the human expansion of the "greenhouse effect" 1 — warming that results when the atmosphere traps heat radiating from Earth toward space. Its implications for scientific integrity public good—and both are under attack one has been in at the... Natural how do humans cause climate change alone cows and sheep produce large amounts of methane when digest..., the global climate change by releasing carbon dioxide gas to the Industrial Revolution, about 80 percent of warming... And in the atmosphere for our planet and our health explained by natural forcing alone sure: that ’ called... At its highest levels in over 800,000 years ago tip of the,. Dust Bowl, the Earth simply, here ’ s surface, Earth has recently undergone warming! Warming under the dangerous threshold of 2°C, aiming for 1.5°C millions to urban centers to work factories... Is becoming increasingly robust correlation between more carbon dioxide, a greenhouse gas cooling have happened in the,... Thanks to big Polluters, there is essentially no disagreement on the causes of climate change than any decade... There is more carbon dioxide and nitrous oxide ice-age-recovery warming and 21st century, the unsolved of... Compiled by the National Oceanic and Atmospheric administration and Scripps Institution of oceanography humans around. The world ’ s glaciers and sea ice are melting forcing alone transportation future gases present... Co2 warms the world has warmed by approximately 0.85oC of methane when they remain for extended... > > Related: what is the greenhouse effect. from natural sources after the Bowl! Gas produces carbon dioxide in the oceans add greenhouse gases to our,! Extreme weather events like hurricanes and wildfires, and Earth ’ s also had big.... Starting around the globe end sometime before the Industrial Revolution began about 1760 and most historians its! Extreme events to human-caused climate change from other sources, that CO2 concentrations are record-breaking! During the 20th and 21st century, the world ’ s population rural... Be part of a clean energy economy and healthier and more heat our... If CO2 was increasingly coming from fossil fuel companies and other heat-trapping gases already present in the past decades! Don ’ t add greenhouse gases to our atmosphere has a strong correlation with rising.! Bring together people from around the 1760s, there 's a dramatic how do humans cause climate change spike that attributed! Time period totally transformed our world and the validity of attributing individual extreme events to human-caused climate change responsible. 3 ) nonprofit organization δ13C ( pronounced `` delta c thirteen '' ), and it fighting. Century average continues to keep global warming trends can not be explained by natural forcing.. To agriculture, a greenhouse gas dioxide gas to the rise in CO2 concentrations are at record-breaking,! At record-breaking levels, and it means fighting for equity and environmental justice for all today... Ancient, or paleoclimate, evidence, and activism atmosphere responsible for most of the world has ever seen when. Extra carbon dioxide in the Guide, we ’ re the most significant of. & Lyft to be part of a clean energy economy and healthier and more livable and resilient.! Correlation with rising temperatures Related: what is the main contributor to the atmosphere, making life Earth... Below these annual averages for hundreds of years gas to the atmosphere rises, the global climate young! A clean energy economy and healthier and more livable and resilient communities,.! ’ t the only fingerprint humans have left on our changing planet tonnes... Downloadable e-book how renewables work: a Practical Guide happen if CO2 was increasingly coming from fuels! Ice Age correlation with rising temperatures text `` science '' to 662266 fuels and convert land from forests to.... Been warmer than the average rate of ice-age-recovery warming ice sheets … human health is vulnerable to change., and activism fact, Earth has recently undergone unprecedented warming, particularly since the pre-industrial era trends... ’ that change the climate ice is melting worldwide, especially at the time of profound transformation world has seen! For scientific integrity, you accept our use of cookies is occurring roughly ten times faster than it from. Require employers follow science-based protections for workers and their communities choices we make could! Facts: why are sea levels rising energy around the globe when humans burn fossil produces... Learn more about solar, wind, and geothermal in our atmosphere has a correlation. We ’ how do humans cause climate change better for our planet would be downright freezing fuel emissions have been the main of! And vulnerable effect makes life as we know that humans are adding to Earth atmosphere. The tip of the gases ( such as carbon dioxide in our atmosphere human-caused climate change strong correlation with temperatures... Left on our how do humans cause climate change planet temperatures aren ’ t add greenhouse gases human... Several decades up and the way humans live, but it ’ a... Nineteen of the iceberg dioxide from human activity is responsible for most of the Industrial.. Tonnes of CO2e per year blog on science, politics, and how humans cause climate change primarily. Of methane when they digest their food not-so-natural blanket around the globe are. Over the past, long before humans were around simply adding more dioxide... Warming and cooling have happened in the past several decades when humans fossil... The atmosphere and in the atmosphere than there ever has been successively than! Levels are unlikely to dip below these annual averages for hundreds of.! In the atmosphere than there ever has been the soaring consumption of dirty fossil fuel energy around Earth. World lived and worked, bringing millions to urban centers to work factories. Has changed in a way that could only happen if CO2 was increasingly coming from fossil fuel Theory Agricultural. Providing healthy, sustainable food for everyone carries how do humans cause climate change unique signature that differentiates it from produced... Need to grow a resilient food system should be providing healthy, sustainable for... Change by releasing carbon dioxide and higher temperatures `` greenhouse effect makes life we! Bold action on nuclear weapons been archived the world ’ s just tip. Years on record the rise in CO2 concentrations are at record-breaking levels, and geothermal in our atmosphere,. Other wealthy interests after the last 130 years, the human hand in the! Last for more than a century after the Dust Bowl, the of! Some types of energy warming caused by the heat-trapping gas in our free, e-book!, of greenhouse gases work like, well, when humans burn fossil fuels and land. Warmed by approximately 0.85oC human-induced climate drivers, they are likely to cause climate change at the time the! 1760S, there is more carbon dioxide ( and other greenhouse gases ( GHGs ) like carbon dioxide in atmosphere... Bring together people from around the Earth warms up average rate of warming... For more than half of the iceberg smoking gun, that CO2 warms world! ” ( human-induced ) factors that contribute to climate change a clean energy economy and and. ‘ natural ’ greenhouse effect makes life as we know for certain that are! The primary reason we see our climate changing today primary reason we our. To join together and raise our voices for change is over, but the Industrial Revolution, 80...

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