It's well known that air pollution from today's electric power plants is a major cause of problems like smog, acid rain, and global warming. It's bad for our health and the environment. While some of the nation's power companies are increasing the use of cleaner sources of energy, the U.S. department of Energy estimates that by 2020 only about 10% of utility electricity will come from renewable energy sources like solar and wind power. Why wait? You can generate your own pollution-free electricity today.