This is more than a 'just cause':).
I have been doing my little part in keeping the environment clean; not using plastic bags when I do grocery shopping, refusing the shop attendants if they offer me one when I am only purchasing a few items I can just throw in my bag, and... never litter!
The house I am about to move into in a few weeks, is also prepared for me to make it green:)
How about you? What little efforts and or habits you think you can do or now doing to be part of earth's little saviors? What are you telling your children about it?