The science is clear: climate change is happening. We are the cause. We need to act now.<\/p>\n<\/div>\n<\/div>\n

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Scientists have studied global warming for over 100 years. Many thousands of experts have tested hypotheses, gathered evidence, constructed models, debated results, and reviewed one another\u2019s work. Thousands of papers are written every year, produced from nearly every leading university and research institution on Earth\u2014from Harvard to NASA and the US Department of Defense.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

The consensus couldn\u2019t be clearer. Climate change is happening. It\u2019s caused primarily by the burning of oil, gas, and coal. If we do nothing, the world will become significantly less habitable.<\/p>\n

We\u2019ve lost precious time, but if we act now\u2014decisively and dramatically\u2014we still have a chance at avoiding climate change\u2019s most catastrophic impacts.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

The basics<\/h2>\n
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Information about the threats to the global environment from global warming and the loss of biological diversity.<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n
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When released into the atmosphere, certain gases act like a blanket, preventing heat from escaping. One of the most important heat-trapping gases is carbon dioxide (CO2), which is released when we burn fossil fuels like oil, coal, and natural gas.<\/p>\n
Once released, carbon dioxide stays in the atmosphere for roughly 40 years, though its effects stay much longer; other gases, like methane, are even longer-lived. The cumulative effect is to raise the planet\u2019s temperature. Heat from the sun that would otherwise escape remains on Earth, warming the oceans, land, and air. As temperatures increase, the planet changes. The seas rise. Droughts and wildfires grow worse. Extreme weather becomes more common. Eventually, entire regions become uninhabitable.<\/p>\n
The more carbon dioxide we produce, the worse these and other impacts become\u2014and the more difficult it is to change direction.<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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The evidence<\/h2>\n
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Ten Signs of Global Warming <\/a><\/h3>\n
Ten ways climate change affects our planet.<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n
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Scientists have taken detailed measurements of carbon dioxide (CO2) levels since the late 1950s. They\u2019ve also gathered in-depth records of past CO2 levels from sources like ice core studies.<\/p>\n
The results? Carbon dioxide levels are higher today than any point in at least 800,000 years. The cars we drive, the fuel we burn for electricity and warmth, the food we eat or waste, and the forests we clear are the cause.<\/p>\n
Temperature trends from around the world reinforce these findings. Every one of the past 40 years has been warmer than the 20th century average. The 12 warmest years on record have all occurred since 1998. The five warmest were 2014 to 2018. We\u2019ve already warmed the planet by 1 degree C (1.7\u00baF).<\/p>\n
Climate models successfully forecast these temperature increases, as well as other impacts like sea level rise and ocean acidification. The models now suggest that we need immediate, dramatic reductions in our CO2 to avoid catastrophic impacts\u2014and that time is running out.<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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The impacts<\/h2>\n
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Report<\/div>\n
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$\"Raft$ <\/div>
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The Science Connecting Extreme Weather to Climate Change <\/a><\/h3>\n
Climate attribution identifies and quantifies the part human-caused climate change plays in worsening many types of extreme weather.<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n
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The consequences of climate change are already here. In the United States, chronic flooding threatens coastal communities from Texas to Maine. Mega-storms like Harvey, Maria, and Katrina are increasingly commonplace. Wildfires, heat waves, droughts, and inland flooding continue breaking records.<\/p>\n
Without immediate emissions reductions, these impacts will worsen. Globally, food and water shortages could displace hundreds of millions of people, increasing conflict and war. Entire regions of the world may become uninhabitable. Much of what we take for granted today\u2014from productive agricultural land and reliable growing seasons, to coastlines and coral reefs\u2014will change dramatically. Much will be lost.<\/p>\n<\/div>\n<\/div>\n<\/div>\n
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Solutions<\/h2>\n
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$\"A$ <\/div>
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Solutions <\/a><\/h3>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n
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The world\u2019s leading voice on climate science, the International Panel on Climate Change (IPCC), explains that the worst impacts of climate change could be avoided if we successfully limit global warming to under 1.5\u00baC to 2\u00baC.<\/p>\n
Doing so will not be easy. Under current emission levels, we\u2019ll likely exceed 3\u00baC this century. For a fighting chance at 1.5\u00baC, we need to reach \u201cnet zero\u201d global emissions by 2050.<\/p>\n
\u201cNet zero\u201d means that all the sources of heat-trapping emissions (such as burning fossil fuels) must come in balance with all the processes that remove heat-trapping gases from the atmosphere (such as the growth of forests). Achieving net zero emissions will require massive changes in the energy, transportation, and food sectors, as well as afforestation and new \u201cnegative emissions\u201d technologies (such as direct air capture machines that pull CO2 out of the air).<\/p>\n
Fortunately, we have clean energy and clean vehicle technologies today. We have scientific consensus. We know what needs doing. We only need to act.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"
Climate Science The science is clear: climate change is happening. We are the cause. We need to act now. Scientists have studied global warming for over 100 years. Many thousands of experts have tested hypotheses, gathered evidence, constructed models, debated results, and reviewed one another\u2019s work. Thousands of papers are written every year, produced from … <\/p>\n
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