Image Credit

Description:

Ocean Science science fair project This photo shows the glass roof of a greenhouse, which lets light in and traps heat inside so that plants can grow, even in a cold climate. (Wikimedia Commons, 2006.)

Source:

Wikipedia Commons

License:

Public domain

Source URL:

http://upload.wikimedia.org/wikipedia/commons/a/a6/Botanischer_Garten_BS.Seerosen.jpg