When we burn coal and oil for energy, we cause pollution. But little by little we're getting more energy from the sun and the wind. This energy is clean and renewable (that means we'll never run out of it). Energy from the sun now helps heat and light more than 100,000 homes in the United States. More good news: many electric companies have discovered that saving energy is better than making more energy. So they can send experts to homes in the U.S. to look for energy "leaks"-places where energy is being wasted. Everyone needs to have his/her home checked for leaks.