Don't die before marking this mission complete!
Stop and reflect. Take some time to create a map of your emotions.
Next time you find a dead animal, draw a white line around its body and find out who killed it, how, when, where, and why.
Go somewhere you like that is in danger of disappearing or changing forever. What is threatening to kill this place? Take photographic evidence and submit it to your local authorities.
Design a memorial to remind people of you.