I really like this idea! I believe Hive account@treeplanter ran a tree planting initiative on Steem, but it's not active on Hive and transitioned to a voting bot a long time ago. I'm happy to see a much better alternative!

Maybe it'd be nice if you also accept direct transfers as donations! That way, anyone that wants to compensate CO2 in bulk, perhaps after taking a flight, can just send you some HBD or Hive directly. That's a lot easier than writing content that'll receive $100 worth of upvotes ;).

For a future post it might be a good idea to provide a statement on how you'll use the voting power of Hive account@reforest. You already mentioned it in your post: this is a blockchain, so if you provide your intentions, we can verify if you're adhering to them.

Thanks for putting in all the effort to create this. I'll make sure to use this on any environment related posts I'll make in the future!