All explainers
Explainer

Are Humans the Major Cause of Global Warming?
A straightforward explanation of how we know that humans cause global warming, using charts, graphs, and plain language.
Explainer

What is Solar Geoengineering?
Solar geoengineering technologies cool the earth by reflecting sunlight back into space—but they pose many risks, challenges, and uncertainties.
Explainer

Vote-By-Mail and the 2020 Election
More voters than ever before will cast their ballots by mail this year. How do we know it's reliable, and how it will make this year's election different?
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Each Country's Share of CO2 Emissions
Which 20 countries emit the most carbon dioxide? This table shows data compiled by the Energy Information Agency, which estimates carbon dioxide emissions from all sources of fossil fuel burning and consumption.
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Comparing Electric Vehicles
The difference between a conventional hybrid electric vehicle, a plug-in hybrid electric vehicle (PHEV), battery electric vehicles (BEVs), and fuel cell electric vehicles explored.
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No First Use Explained
What's a No First Use (NFU) Nuclear Policy and would adopting one make the United States safer?
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Climate Change and Wildfires
Wildfire activity in the US is changing dangerously, as conditions become hotter and drier due to climate change.
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The Clean Power Plan
Analysis and information on the EPA's Clean Power Plan.
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Voting Rights and Environmental Justice
Disenfranchisement through voter suppression and gerrymandering prevents overburdened communities from fighting back against threats to their well-being.
Explainer

What is ZEV?
The Zero Emission Vehicle (ZEV) program is a California state regulation that requires automakers to sell electric cars and trucks in California.
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The Endangered Endangered Species Act
Our planet's rich variety of plant and animal life provides many important products and services—from foods and medicines to clean water and pest control—as well as a multitude of less tangible benefits.
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Sustainable Agriculture Practices
Here are four key methods 21st-century farmers are adopting to take better care of the land that they—and we—depend on.
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Coal Power Impacts
Formed deep underground over thousands of years of heat and pressure, coal is a carbon-rich black rock that releases energy when burned.
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Hurricanes and Climate Change
Increasingly destructive hurricanes are putting a growing number of people and communities at risk.
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Holding Major Fossil Fuel Companies Accountable
Major fossil fuel companies have known for decades that their products—oil, natural gas, and coal—cause global warming.
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Global Warming Solutions: Prepare for Impacts
Certain consequences of global warming are now inevitable, including sea level rise, more frequent and severe heat waves, growing wildfire risks, and an increase in extreme weather events.
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Global Warming in the Midwest
Learn how global warming is affecting the US Midwest—and why these consequences will become more costly and damaging in the years to come.
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EPA Decision Increases Air Pollution Risk
The Clean Air Act has a long record of keeping Americans safe from air pollution and its damaging health effects. A recent decision by Environmental Protection Agency threatens to walk back these vital protections.
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Scientific Advisory Committees
A crucial resource helping policymakers use science to serve the public good, federal science advisory committees are facing unprecedented neglect under the Trump administration.
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US Missile Defense Timeline
More than 50 percent of test intercepts have failed.
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Climate Change and Agriculture
Industrial agriculture makes farms more vulnerable to climate impacts.
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CO2 and Ocean Acidification
Rising CO2 concentrations in the atmosphere are changing the chemistry of the ocean, and putting marine life in danger.
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The National Climate Assessment
The most comprehensive, peer-reviewed analysis of the latest science on climate change and its impacts in the United States.
Explainer

2020 Dietary Guidelines for Americans
Let's ensure that science is the main ingredient.