i will teach you step by step how to save the earth.
Step 1: Energy: wind turbine
buy or make a wind turbine to save energy it is good to make wind turbines because you will have energy from the wind and will save you money.
Step 2: Energy: solar panels
install a solar pannel in your house it will give you solar energy and slash your enregy bills too here a site you can buy from http://energyforearth.net/default.htm
Step 3: Save the earth: planting plants
its earth day every day so plant trees and plants to make more oxygen and to save the earth.
Step 4: Save the earth: recycle
Lets recycle things to make earth not dirty and polluted even a tiny recycle helps.
Step 5: Save the earth: plastic bags
dont use plastic bags use a other bags not plastic and never ever put trash or plastic in the ground.
if you all the steps you can have free energy and you can save the earth