Center for Biological Diversity

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

Bookmark and Share

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 take one minute to 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 114138 signatures
Number Date Name Location
114138 Wed Aug 20 11:21:27 EDT 2014 Merri Isom Austin, TX , US
114137 Tue Aug 19 11:37:34 EDT 2014 michael farkas oxford, PA , US
114136 Tue Aug 19 02:28:47 EDT 2014 Maria Martinez Johnson City, NY , US
114135 Mon Aug 18 18:00:11 EDT 2014 mauricio carvajal Santiago, ot , CL
114134 Mon Aug 18 15:53:52 EDT 2014 Barbara Britz Berkeley, CA , US
114133 Mon Aug 18 05:49:56 EDT 2014 Natalie Santiago Chula Vista, CA , US
114132 Sun Aug 17 20:31:57 EDT 2014 S Gilbreath Valley Mills, TX , US
114131 Sun Aug 17 19:05:00 EDT 2014 sonja wong Brooklyn, NY , US
114130 Sun Aug 17 14:14:55 EDT 2014 betty almand avondale est., GA , US
114129 Sun Aug 17 13:30:30 EDT 2014 janice polito El Mirage, AZ , US
114128 Sun Aug 17 13:28:51 EDT 2014 Valerie Sanderson Lake Mills, IA , US
114127 Sun Aug 17 09:52:41 EDT 2014 susan cooney Bath, ME , US
114126 Sun Aug 17 09:51:36 EDT 2014 susan cooney Bath, ME , US
114125 Sun Aug 17 08:51:38 EDT 2014 sonja syne pompano Beach, FL , US
114124 Sun Aug 17 07:07:03 EDT 2014 Martin Haunhorst Bonn, ot , DE
114123 Sun Aug 17 05:43:08 EDT 2014 liron solomon holon, ot , IL
114122 Sun Aug 17 05:20:22 EDT 2014 alunni ilaria perugia, ot , IT
114121 Sun Aug 17 02:57:16 EDT 2014 Sampson Chan San Francisco, CA , US
114120 Sun Aug 17 01:22:24 EDT 2014 Anonymous Rosamond, CA , US
114119 Sat Aug 16 22:26:50 EDT 2014 Tina Colafranceschi Whitethorn, CA , US
114118 Sat Aug 16 21:37:08 EDT 2014 Sigfrido Quijano oakville, ON , CA
114117 Sat Aug 16 18:21:46 EDT 2014 Amy Wallace Cheboygan, MI , US
114116 Sat Aug 16 17:54:52 EDT 2014 sara kolp Portland, OR , US
114115 Sat Aug 16 17:36:09 EDT 2014 DENISE KASTNER LOWELL, IN , US
114114 Sat Aug 16 16:18:36 EDT 2014 Alexis Mummert Spokane, WA , US
Next ->

*Fields marked with an asterisk are required.

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.