It's absolutely admirable that you're trying to save the planet, but it's like stopping a fist fight on the titanic: you can have a little victory but the ship is sinking regardless. The metaphorical ice berg isn't very far away and it's really not your fault, so don't feel accountable for it.

The best thing you can do for yourself is to stop reading the doom and gloom, and live for and enjoy the moment. Obviously live within your values, but also remember to do what brings you joy.