You could use the XYO Network to support Fridays for Future. Sentinels (GPS trackers) collect GPS and sensor data that could help compare today's data with future data. That's how global warming can be recorded. You also earn the cryptocurrency XYO, which you can sell on a stock exchange or donate or geodrop to the Fridays for Future (a very cool feature in Dapp called COIN). That could be a nice cash injection for the fight against climate change.
Apart from that, I'm convinced that the XYO Network can help in the future to make the world a better place. The many data could help to make global trade more environmentally friendly. Look at that and tell me what you think about it.
If all of Fridays for Future's supporters download this app, collect data and donate, it could become a damn big THING. I do not know how committed you are to this movement, but you could help spread the word.