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

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.

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

26-50 of 111057 signatures
Number Date Name
111032 Mon Jan 08 14:47:28 EST 2018 Anonymous
111031 Mon Jan 08 13:55:53 EST 2018 Cindy Stein
111030 Mon Jan 08 13:55:06 EST 2018 Cindy Stein
111029 Sat Jan 06 15:47:39 EST 2018 Shirley McGrath
111028 Thu Jan 04 20:13:30 EST 2018 angela St James
111027 Thu Jan 04 15:40:15 EST 2018 Elisabeth Bechmann
111026 Thu Jan 04 15:28:42 EST 2018 Tammy Heath
111025 Thu Jan 04 09:40:05 EST 2018 Caroline Smith
111024 Wed Jan 03 10:42:04 EST 2018 Judith Hankins
111023 Mon Jan 01 15:39:23 EST 2018 Janet Hermann-Dougherty
111022 Mon Jan 01 15:37:01 EST 2018 Janet Hermann-Dougherty
111021 Sun Dec 31 16:45:29 EST 2017 Sara Katz
111020 Fri Dec 29 18:49:16 EST 2017 Wendy Dugmore
111019 Fri Dec 29 12:00:56 EST 2017 Erin Kiesow
111018 Fri Dec 29 09:35:32 EST 2017 Molly Pickel
111017 Tue Dec 26 20:03:06 EST 2017 John Geiger
111016 Thu Dec 21 15:31:06 EST 2017 Patricia Shore
111015 Thu Dec 21 14:11:13 EST 2017 Kate y
111014 Wed Dec 20 10:43:49 EST 2017 Elaine Robinson
111013 Wed Dec 20 10:37:32 EST 2017 Elaine Robinson
111012 Tue Dec 19 23:11:47 EST 2017 Jose Briceno
111011 Tue Dec 19 23:03:43 EST 2017 Jose Briceno
111010 Sun Dec 10 22:22:07 EST 2017 Jeanine Ten Broeck
111009 Sun Dec 10 19:30:13 EST 2017 Mary Jeffrey
111008 Sat Dec 09 23:53:40 EST 2017 Teri German
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Please take action by Jan. 14, 2019.

Photo of smokestack courtesy NASA.

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