Center for Biological Diversity

People's Petition to Cap Carbon Dioxide Pollution at 350 Parts Per Million

Prominent climate researchers have warned that we must reduce the level of atmospheric carbon dioxide to 350 parts per million (ppm) or below in order to stabilize climate change and avoid global catastrophe. The Center for Biological Diversity, along with Bill McKibben's group, is advocating strongly for this necessary standard.

While carbon dioxide isn't the only global warming pollutant we need to control, it's the number-one contributor to climate change.

Please join us in moving toward a real solution to the climate crisis by calling on the U.S. Environmental Protection Agency to do its job as science, the law and common sense require.

Sign the People's Petition to Cap Carbon at 350 Parts Per Million today.

I support the legal petition filed by the Center for Biological Diversity and to the EPA to cap atmospheric carbon dioxide levels at 350 parts per million -- the level science says is necessary to avoid the worst impacts of global warming -- under the Clean Air Act.

For four decades, the Clean Air Act has protected the air we breathe through a proven, successful system of pollution control that saves lives and creates economic benefits exceeding its costs by many times. It's time to fully use one of our strongest existing tools for reducing greenhouse gas pollution: the Clean Air Act.

Now is the time to enforce the Act, not gut it. I urge you to move swiftly to grant the petition and enforce the Clean Air Act.


Dr. James Hansen, Climate Scientist
Bill McKibben, Founder, Author
Ed Begley, Jr., Activist /Actor
Bonnie Raitt, Musician / Activist
Barbara Kingsolver, Author
Doug La Follette, Wisconsin Secretary of State
Dr. Helen Caldicott, Anti-Nuclear Activist
ChiQ Simms, Navigation Foundation
Dr. Michael Dorsey, Director- Sierra Club National Board
Brock Evans, President- Endangered Species Coalition
Dinah Bear, Attorney-at-Law
Curtis Moore, Author and former Republican Counsel, Committee on Environment and Public Works, U.S. Senate
Dr. Thomas Lovejoy, Biodiversity Chair, Heinz Center
Dr. Niles Eldredge, Curator in the Department of Invertebrates, American Museum of Natural History
Dr. John Terborgh, Research Professor Emeritus and Director, Center for Tropical Conservation, Duke University
Jonathan Baker, Co-founder, Sol Sage
Joshua Beckman, Poet
Kate Bernheimer, Author
Elise Blackwell, Author
Adam Braver, Author
Alan Cheuse, Author
Ron Currie, Jr., Author
Kathryn Davis, Author
Alison Deming, Author
Jay Driscoll, of band Barefoot Truth
Rikki Ducornet, Author
Ben Edlund, TV Writer and Comic-book Artist
Jennifer Egan, Author
Daniel Handler, Author
Oliver Houck, Author and Professor of Law, Tulane University
Alex Irvine, Author
Anna Lappe, Author, Small Planet Institute
Jonathan Lethem, Author
Victor Lodato, Author
Alec Loorz, Founder, Kids vs. Global Warming
Victoria Loorz, Co-Founder, Kids vs. Global Warming
Ben Marcus, Author
Lydia Millet, Author
Rick Moody, Author
Jenny Offill, Author
Zyg Plater, Professor of Law, Boston College Law School
Dr. Melissa Savage, Professor Emeritus, University of California Los Angeles
Aurelie Sheehan, Author
Darcey Steinke, Author
Darin Strauss, Author
Donna Tartt, Author
Lynne Tillman, Author
Fred Tomaselli, Artist
Harvey Wasserman, author of SOLARTOPIA! Our Green-Powered Earth, A.D. 2030
Don Waters, Author
Eric Zencey, Visiting Associate Professor of Historical and Political Studies, Empire State College
Luanne Rice, Author
Mike Tidwell, Director, Chesapeake Climate Action Network
Optional Member Code

1-25 of 117412 signatures
Number Date Name Location
117412 Sat Jul 23 17:23:27 EDT 2016 Gina Dalvesco Ambridge, PA , US
117411 Sat Jul 23 17:20:32 EDT 2016 Brock Grill Lake worth, FL , US
117410 Sat Jul 23 09:29:51 EDT 2016 Gabriele Zimmermann Romanshorn, ot , CH
117409 Fri Jul 22 21:54:36 EDT 2016 Dawn Carr Charlotte, NC , US
117408 Fri Jul 22 18:08:13 EDT 2016 Casey Pittman Coppell, TX , US
117407 Fri Jul 22 17:48:01 EDT 2016 angela fox desert hot springs, CA , US
117406 Fri Jul 22 16:29:33 EDT 2016 Carrie Moore Oklahoma, OK , US
117405 Fri Jul 22 16:07:11 EDT 2016 josh pucci VA, VA , US
117404 Fri Jul 22 14:44:58 EDT 2016 Karen Neubert LA, CA , US
117403 Fri Jul 22 13:17:59 EDT 2016 jon brock dallas, TX , US
117402 Fri Jul 22 04:28:02 EDT 2016 gregory.a.. clewell seaside heights, NJ , US
117401 Fri Jul 22 04:27:55 EDT 2016 Carlo Zucchi Como, ot , IT
117400 Fri Jul 22 00:52:28 EDT 2016 cheryl erb salem, OR , US
117399 Fri Jul 22 00:14:56 EDT 2016 Mari Mennel-Bell Fort Lauderdale, FL , US
117398 Thu Jul 21 23:59:03 EDT 2016 Joshua Santos Mississauga, ON , CA
117397 Thu Jul 21 22:01:11 EDT 2016 Monica Fellowes Fredericksburg, VA , US
117396 Thu Jul 21 21:16:28 EDT 2016 Chris Guillory Port Angeles, WA , US
117395 Thu Jul 21 18:14:44 EDT 2016 Germano Brandes TX, TX , BR
117394 Thu Jul 21 16:27:17 EDT 2016 Graham Douglas, J.D. South Carolina, SC , US
117393 Thu Jul 21 16:21:24 EDT 2016 kathleen conner denver, CO , US
117392 Thu Jul 21 15:56:35 EDT 2016 Nick Moidja Gold River , CA , US
117391 Thu Jul 21 15:22:52 EDT 2016 Priscilla Tine Knoxville, TN , US
117390 Thu Jul 21 15:19:18 EDT 2016 Karl Emmeram Liechtenstein Syrgenstein, NV , DE
117389 Wed Jul 20 19:49:24 EDT 2016 Christopher Porter Wallasey, ot , GB
117388 Tue Jul 19 16:30:47 EDT 2016 Caleb Bourgeois Thibodaux, LA , US
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Several lines of evidence show that allowing atmospheric carbon dioxide levels to remain above 350 ppm for a sustained period of time will lead to dangerously acidic oceans, runaway global warming, and melting of the polar ice caps. Such a climate would be well outside anything experienced in the history of the human species, and would carry with it irreversible cascades of species extinctions and significant dangers for human civilization.

What's needed is an immediate reduction of atmospheric carbon dioxide, with the goal of an overall concentration of 350 ppm or less to be achieved as quickly as possible. To accomplish that, the Center supports the rapid phasing out of all coal-fired power plants; the highest technologically feasible vehicle-mileage standards;
and a ban on extreme energy development like Arctic drilling, tar sands and fracking, among other critical measures.

Smokestacks photo courtesy NASA.