How long does it take egg shells to decompose in a landfill?

I would say about a million years. When I was younger, my family did an experiment, trying to see how long it took an egg shell to break down. It still hasn't to this very day. I was about nine, and...

100 years

Under ideal conditions, a paper carton can decompose in about 3 weeks. Ideal conditions would be chopped up in the middle of an actively decomposing compost pile. A polystyrene carton takes hundreds...

Cars are seldom put into landfills; they contain enough easily recoverable metal to make recycling them a paying proposition.

An aluminum soda can will last hundreds or even thousands of years unless exposed to acidic soil or water. You can find remnants of soda cans that have been eaten away by acid from rainfall. Aluminum...