There are a lot of things you can do to help stop pollution. The first is to get educated and keep up with current events. Most pollution is caused by the demand of the public for things, like clothes, appliances, cars, energy. So we can affect what is polluting by changing our using and buying practices. Don't buy things you don't need.
Energy production is a big polluter.
And cars are very bad too. There are now cars on the market that can get 60 to 70 miles per gallon. Use cloth napkins, hand towels, glass cups, etc. If you are going to use something a lot, buy good quality, so it will last a long time. Then, whatever you can't use over, try to recycle it.