Glass
Added: Jun 5th, 2008
is like aluminum. It is an investment in the future. It is energy expended, and needs salvaging. Glass is one of the most monumental discoveries of our time. It is stupendous!
A substance which allows one form of energy (light from the sun) from passing, but prevents another (heat from the sun) from escaping. Wow. The ancient Romans used glass (the wealthy ones) to trap heat in their homes in winter.
Every bit of glass going into the landfill is a terrible waste. We must actively recycle and re-use this energy intensive substance.