We do this with our Cosmos ecosystem nodes that we run. Basically think of it as similar to a witness on Hive, but most chains have about 100 to 150 nodes producing blocks versus Hive's 21.

So delegating to our nodes on the chains we support helps support our efforts.

Currently our EVMOS and JUNO nodes are donating 20% of the commissions to our eco friendly causes. The rest are doing 10% because of market values and server costs.

You can go to our Ecologi page https://ecologi.com/carbonzero and gift directly from there as well if you aren't into the Cosmos ecosystem.