Environment-3: 'Plastic Bottles'

40 billion plastic bottles are produced each year in the United States. Two-thirds of them end up in landfills. Avoid this by recycling them. - wikiHow

For a detailed article on 'Plastic' and 'Plastic Recycling' from Wikipedia:

http://en.wikipedia.org/wiki/Plastics

http://en.wikipedia.org/wiki/Plastic_recycling

Grateful thanks to wikiHow and Wikipedia.