Nan from Stripe's Climate team here! You might be able to deduct it as a business expense, but you’ll want to talk to your tax advisor first. We have a little more on this in our FAQ: https://stripe.com/docs/climate/faqs
Hi, Nan from Stripe! Accepting direct contributions from individuals isn’t a central focus for us right now, but we intend to publish what we learn about carbon removal, which can help inform your own efforts. Some of our partners accept contributions directly: https://www.climeworks.com/subscriptions, https://projectvesta.org/crowdfunding/