From Earth Month Challenge: 30 Easy Actions:  

Put a politician on speed dial.

What? How can this be considered an environmental action for Earth Month? Frankly, it can. Those in office have a great deal of power and influence by making laws that take care of the world in which we live. By having your Senators and Representatives in your contact list, you can quickly call and leave a message with your position on environmental policies and bills. Whether or not you influence the vote, the people in office will have a collection of data showing how their constituents feel about the issues facing them.

Stay tuned for more eco-friendly actions throughout April – or go to Treehugger yourself!