Solar power is the fastest growing source of electricity in the U.S. People used 41 percent more solar electricity in 2015 than they did in 2014. If the average U.S. household used only solar electricity for a month, it would keep 1,162 lbs of CO2 out of the atmosphere. It can be powered for more than one month with the electricity it would take to power a 100-watt incandescent light bulb for an hour. Does your home, or the home of someone you know, use solar power? Why might (or not) solar power be a better choice than other energy sources?