Some states will pay you to recycle aluminum cans and some types of plastic or glass bottles.
For more information please visit http://www.recycle.com/pdfs/payt.pdf
This helps to save the environment and also provides an extra source of income.
In states that don't pay to recycle, there are still privately owned salvage companies that will purchase scrap metal (aluminum cans, old cars, broken metal appliances, etc.)
Find recycling centers in your area at http://www.earth911.org