There are some places where there can be a good excess of renewable energy and this is where Bitcoin miners can come in and do business. Right now, there are already many miners who are using renewable energy making the BTC they are mining to be labelled as green. Hopefully, this can help in putting aside the concerns and fears of many environmentally-inclined people that BTC can be bad for the planet. All businesses are requiring some energy without exemption, that is something we have to remember.