Once reserved only for the most ardent environmentalists, alternative energy from solar, wind, or water power is becoming easier and more cost efficient for average Americans to use. Solar energy is a good bet for those who have the space and live in the right climate. Solar water heaters, in particular, are a simple and cost-effective way to cut your energy bill without a lot of fuss. Small, family-style wind turbines are also increasing in popularity for those who live in windy areas.