first of all it is AN environment. but you can start a charity or something and raise money for the terrain you are interested in protecting. if it is rain forest, you can actually adopt an acre. or...
Try to take public transit, turn off electronic when they're not in use, and don't litter. Also, try to use less water by taking showers instead of baths, turning off taps when brushing your teeth,...
You should protect the environment, because if it is ruined then eventually the Earth will be destroyed. It is our home. But not only is it our home, but also animals' home. Its bad enough that we're...