Thank you very much for your interest in supporting CCI.

Please contact for ways to contribute, or simply send a check, payable to Carbon Cycle Institute, to:

Carbon Cycle Institute
245 Kentucky Street, Suite A
Petaluma, CA 94952

You may also make donations via Paypal’s secure payment system by clicking on the button below.

If you would like to make a donation to the Marin Carbon Project, please send a check payable to Carbon Cycle Institute and include “MCP” on the notes line of your check. If donating via Paypal (press Donate button above), please add “MCP” as a notation under “add special instructions to CCI.”

Carbon Cycle Institute is exempt from federal tax under section 501(c)(3) of the Internal Revenue Code. Donations are tax deductible to the extent allowed by law.