I'd like to say a little story what i heard on radio:
" In one morning the beach was full of dying sea stars, hundreds. Were came a lot of people that watch and feel sory for them. There were even the television. And a boy that come on the beach took one sea star and throw it into water, and then took another one and do the same, and a man asked him: " Why are you doing this? there are too many, you couldn't save them all" and the boy answered " At least for this ones I make a difference, I save them" . After this answer the man started doing the same and many others.
The moral of the story: if you want to make a difference, start doing, you wouldn't know how big it will be in the end. The change can start with us, all we need is the need courage!