It is over 160 pages long, but well worth studying (not merely reading). This is the UN Environment Programme’s Making Peace with Nature.
Most environmental analyses focus in on one major problem, such as pollution or climate change. This report tackles all the ways we are destroying our life support system. It has firm recommendations for action, not just words.
You might want to spend a weekend on studying it, then do your best to be part of the solution, not merely part of the problem. (We are all part of the problem, like it or not.)