Snooz you have a fantastic attitude towards reducing pollution. So many people see the problem as too big, or that anything that they can do, will not fix anything, but if everyone did the things you do, to reduce pollution, these little things would become a huge help to the environment.
Just a tip, instead of carrying a plastic bag with you when your walking, take a calico or reusable one, then you can put any rubbish in it and take it away to be recycled :)
If you have any more tips, or ways to reduce pollution, feel free to post them.