Become a member to show your support for 350 Mass. Any contribution of $35 or more (or any recurring contribution) makes you a member for a year. Consider amplifying the impact of your climate action by donating to make this movement stronger!

All donations are tax deductible. Our tax identification number is 47-1015198. If you would prefer to send us a check, you can send your check to Better Future Project, 30 Bow Street, Cambridge, MA 02138. Memo line: 350 Mass.