You don't need to be a big spokesman or a great leader to inspire change in the people around you. You also don't need to annoy them 24/7 with you environmental thoughts.
The people around you will be inspired by you, by just being a good role model and showing them, that it actually is not that easy. And after some time you will recongize change.
A friend of mine has thrown his coffee maker out with the plastic packages. And that he told me. So how many things may happen that you or the person doesn't even recognize?