2026 Summer Match

We have never been more galvanized as a community to stand up, fight back, and never give in.

15 Years of Defending Science

Since 2011, CSLDF has helped scientists stand up against attempts to silence them.

2025 Year in Review

2025 was challenging in many ways—some we expected and others we could never have anticipated.

2025 Impact Report

We are fighting back against the flood of anti-climate and anti-science actions.

ALERT: Silencing Science Tracker

Check out our revamped database of government attacks on science.

Protecting the Scientific Endeavor

Science Under Siege

The Climate Science Legal Defense Fund has fought for the scientific endeavor since 2011. Our initiatives ensure that scientists can conduct, publish, and discuss their research and advocate for science without the threat of political harassment, censorship, or legal intimidation.

2025 Impact Report

We are fighting back against the flood of anti-climate and anti-science actions.

Climate Litigation Toolkit

Our free legal resources explain the best practices for safely and effectively engaging in climate litigation and other scientific consulting work.

Updated Report: Open Records Laws

These laws, while critical to government transparency, are frequently misused by groups seeking to harass scientists and slow or halt the scientific endeavor. This report can help scientists and attorneys respond to such inquiries.

Political Action Toolkit

Our free legal resources explain the best practices for safely and effectively engaging in political advocacy.

Join Our Mailing List

Our Work

We provide free legal aid and resources to researchers, educate the scientific community about their rights and responsibilities, and strengthen legal protections to promote scientific integrity.

Silencing Science Tracker

The Silencing Science Tracker is a public database that tracks government efforts to restrict, censor, undermine, and misrepresent science since the November 2016 election. To date, we have documented more than 600 attacks on science. We catalog government efforts to restrict, censor, undermine, and misrepresent science.

Safeguarding Scientific Integrity

We promote scientific integrity reforms to ensure the best available research and data inform government decision-making. And we publish resources to advance understanding of how research institutions and federal agencies approach scientific integrity — and how to strengthen legal protections for science and scientists.

Latest Resources and Activities

Scientists: Know Your Rights

The legal risks for any individual scientist are small, but there are actions you can take to protect and defend yourself, especially if you’re involved in scientific advocacy and activism.

Our Expertise in the News

Press | News “They’re pulling out all the stops”: Big Oil’s all-encompassing attacks on climate lawsuits
September 17, 2026 Point Source

Industry allies are now coming after the scientists behind attribution studies. The campaign is designed to dig up information to tarnish scientists’ reputations and, “in the process, intimidate researchers into silence,” said Christopher Marchesano, CSLDF attorney.
Press | News Prosecution: A professor fired for teaching about human impact on climate?
September 17, 2026 Radio-Canada

An unprecedented culture of fear and apprehension has taken hold of the climate science community, argues Chris Marchesano, in-house counsel at CSLDF. "The number of scientists who come to us and face reprisals, censorship, or have questions about their fundamental rights continues to grow."
News | Monthly Update August update: A win for science
August 21, 2026 CSLDF

In a victory for climate science and academia, law professor and climate expert Rachel Rothschild has prevailed against a targeted…

Take a Stand for Science

Your support helps us fight for scientists and defend scientific integrity.

Donate Today

Double Your Impact
Make a year-end donation during our matching challenge and help us raise $20,00 to protect science.

2026 Summer Match

We have never been more galvanized as a community to stand up, fight back, and never give in.

15 Years of Defending Science

Since 2011, CSLDF has helped scientists stand up against attempts to silence them.

2025 Year in Review

2025 was challenging in many ways—some we expected and others we could never have anticipated.

2025 Impact Report

We are fighting back against the flood of anti-climate and anti-science actions.

ALERT: Silencing Science Tracker

Check out our revamped database of government attacks on science.

Protecting the Scientific Endeavor

Science Under Siege

The Climate Science Legal Defense Fund has fought for the scientific endeavor since 2011. Our initiatives ensure that scientists can conduct, publish, and discuss their research and advocate for science without the threat of political harassment, censorship, or legal intimidation.

2025 Impact Report

We are fighting back against the flood of anti-climate and anti-science actions.

Climate Litigation Toolkit

Our free legal resources explain the best practices for safely and effectively engaging in climate litigation and other scientific consulting work.

Updated Report: Open Records Laws

These laws, while critical to government transparency, are frequently misused by groups seeking to harass scientists and slow or halt the scientific endeavor. This report can help scientists and attorneys respond to such inquiries.

Political Action Toolkit

Our free legal resources explain the best practices for safely and effectively engaging in political advocacy.

Join Our Mailing List

Our Work

We provide free legal aid and resources to researchers, educate the scientific community about their rights and responsibilities, and strengthen legal protections to promote scientific integrity.

Silencing Science Tracker

Safeguarding Scientific Integrity

Latest Resources and Activities

Scientists: Know Your Rights

The legal risks for any individual scientist are small, but there are actions you can take to protect and defend yourself, especially if you’re involved in scientific advocacy and activism.

Our Expertise in the News

Take a Stand for Science

Double Your ImpactMake a year-end donation during our matching challenge and help us raise $20,00 to protect science.

Double Your Impact
Make a year-end donation during our matching challenge and help us raise $20,00 to protect science.