I know it sounds hard, but, take shorter showers, use water saving showerheads and turn the water off or down when you don't absolutely need it (shaving and such). Make a compost...all it takes is occasional watering and turning. All you have to do is take your compostable stuff (fruits, veggies, lawn debris) and heap it over a pile of dirt. Get your parents to get florescent lightbulbs. Learn to cook and eat locally. If your parents aren't into that, help them shop and take them to farmers markets...buy fresh eggs, veggies, other stuff...
I applaud your interest...its important!
I applaud your interest...its important!