Roof Tiles That Change Color

I recently read and article on these roof tiles that change color to make heaters and air conditioners less strained. I chose it because the idea caught my eye and I was not sure what the title meant by " Roof Tiles Changing Color" .These tiles would turn white in sunny, hot weather to reflect the sun and in cold weather, the tiles would turn black to attract the sun. These panels will then either cool or warm up the house and will make the heaters and air conditioners less strained. The tiles are made up of layers of thin, clear plastic and a substance similar to the common hair gel. I personally believe that this was a great idea and am surprised that it was not thought of before. It is commonly know that the color black attracts heat and that white reflects the sun and this idea was simple and I really am surprised it was not mentioned sooner. I personally could have came up with the idea but would not have known how to make the product work. This idea actually interests me and I actually want to be an architect of environmentally friendly buildings and this is something someone in that career would use.

http://www.livescience.com/technology/091015-heat-tiles.html