I am feeling that a lot of acts which harm our ecosystem, cause global warming and cause damage to other beings too. What things can I do to minimize the harm from my side? I try not to throw rubbish on street but that is only thing I know. I don’t have recycling bins where I live.


Others have mentioned the meat but wanted to point out this can include milk and milk products.
If there’s any parks near you, go for a walk and bring a bag to collect garbage in. I almost always find wrappers or bottles I can pick up.
If there’s any citizen science projects near you those are great. Scientists sometimes need regular people to just record things from around them like how many bugs they can catch or something.
Also, biodiversity loss is a huge problem. If you can create a hedge or some sort of wild area in your yard it can really boost the local biodiversity over time.
Citizen science is also very engaging and entertaining! I participate in the Breeding Bird Survey in my town, and I get to know my assigned patch of woods like the back of my hand by trying to find all the bird nests (and breeding pairs of various species, and migrating birds) in there each spring.