Do the right thing.
It may not always be clear at first what the right thing is. For example, recycling is fairly easy but accomplishes much less than something more difficult such as changing your diet or giving up your car.
Learn the differences, and do the right thing.
@breadandcircuses Eating one billionaire tomorrow would have a far greater positive effect on Anthropogenic Global Climate Change than going your whole life vegan, car free, child free, pet free...
That the general population can have ANY positive effect is nothing more than propaganda, bought, paid for, and broadcast by, primarily The Oil & Gas Industry, The Auto Industry....