What potential harm to the environment does solar energy cause

There are harmful toxin and chemicals inside solar panels

http://www.paystolivegreen.com/solar-panels-dangers-to-the-environment/

http://runonsun.com/~runons5/blogs/media/blogs/a/make-it-right/PanelDestroyed-small.jpg?mtime=13307
18055

http://www.solarray.com/Images/ImagesTGuides/BrokenModuleCloseup.gif