Explainers, Videos &amp; More

How Bad Are Fossil Fuels Actually?

The true costs of coal, natural gas, and other fossil fuels aren’t always obvious—but their impacts can be disastrous.

A person wades through water on a flooded street, next to partially submerged cars.

Attribution Science

Attribution science shows us precisely how much climate change is shaping and changing our world.

A billboard in Flint, Michigan, that reads "Boiling YOUR Water DOES NOT REMOVE LEAD"

Applications of Climate, Energy, and Environmental Justice

Assessing the key different types of justice (distributive, procedural, and restorative) within the climate and energy movements can be challenging.

A line of school buses in front of smoke stacks.

Environmental, Climate, and Energy Justice—What Do They Mean?

If you’ve encountered these concepts and aren’t totally sure what they mean—we got you.

Features

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A chart showing documented attacks on science between January 2025 and May 2026.

Attacks on Science Tracker

This tool tracks attacks on science from the second Trump administration.

A gavel representing lawsuits from the union of concerned scientists

UCS vs Anti-Science Actions

We're suing the Trump administration on a wide range of issues—and winning.

2025 UCS Science Defenders

The 2025 UCS Science Defenders share a special commitment to leverage science to help their communities. We are so pleased to introduce them, and their great work.

Dirty Air, Dirty Deeds

President Trump has given free rein to some of the most polluting industries in the country.

Videos

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A person standing in front of an image of a mushroom cloud behind text that reads "False alarm?"

Nuclear Weapons Facts You Definitely DON'T Want to Know

How secure are nuclear weapons against accidental, mistaken, and unauthorized nuclear explosions and missile launches?

The Town That Chose to Thrive

Industrial agriculture has harmed local soil, water, and air, and the health of the people who call San Joaquin Valley, California home.

a man in a wheel chair and a woman talking on a city sidewalk

What is the Surface Transportation Reauthorization?

This federal legislation determines how transportation in the US is funded. It also shapes the country’s transportation system.