With 600 vendors and almost 18,000 visitors, the size of the solar power trade show in Las Vegas gives you an idea of just how big the American solar industry is becoming. And according to the Solar Energy Industries Association, it's expected to double in 2016. One of the trends driving that growth has been the falling cost of solar energy. What app do you have that shows you how much solar energy you're producing, how much is that saving you?" This year marked the installation of the millionth solar system in the U.S. That took 40 years from the inception of a solar industry.

Source: CBC News September 18, 2016 08:59 UTC