I pick up broken glass bottles that people deliberately spread on forest trails and mountainess areas. It harms poor animals and bicyclists.
I always bring fruit and snacks to feed the birds and small animals like chipmunks. It brings me joy when I see them eating the food. Because of droughts, animals are eating bark and such to stay survive in the desert.
Picking up trash and glass has been a favorite pass time. My contribution in this effort makes me feel at that moment I am not living in vain. I can be useful.