To make a donation via PayPal’s secure payment system:

Or send a check, payable to Carbon Cycle Institute, to:

Carbon Cycle Institute
245 Kentucky Street
Petaluma, CA 94952

Thank you for your interest in supporting CCI. Please contact for other ways to contribute.

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.