All explainers
Explainer
The Clean Power Plan
Analysis and information on the EPA's Clean Power Plan.
Explainer
How Boiling Water Reactors Work
A slideshow PDF that explains the structure and function of a typical boiling water nuclear reactor (BWR).
Explainer
Does Cold Weather Disprove Climate Change?
It most certainly does not—but it does change the intensity of the heaviest storms.
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?
Explainer
Comparing Electric Vehicles
We explain and compare hybrids, plug-in hybrids, battery electrics, and fuel cell electric vehicles.
Explainer
No First Use Explained
What's a No First Use (NFU) Nuclear Policy and would adopting one make the United States safer?
Explainer
Climate Change and Wildfires
Wildfire activity in the US is changing dangerously, as conditions become hotter and drier due to climate change.
Explainer
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.
Explainer
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.