I learned That we used more energy in 2010 then we did in the 1930's! And that is a lot!! Insalation consevers energy by keeping heat inside of something so you don't have to heat up the house so much. Some things I learned about being safe with energy is that if you don't have it plugged in all the way it is much easier to catch fire. Fuels that put less carbon into our atmosphere is cars, houses, and trees are the best because they take carbon out of the air.