ENVIRONMENT

The threat to environment is obvious.I would like to find various ways by which we can contribute to the safety of environment at an individual level.
1.By saying no to plastics.But can we really?Today every thing comes packed in plastic bags.the quality of these bags is not known.
2.By sorting out the household waste and separating the degradable waste from the rest .
3.By conserving energy i.e. by using electricity etc. only when required.
4.By carefully disposing off the e-waste.But how I do not understand?