Although there is some debate over the health benefits of eating organic, the environmental benefits are clear. When you purchase organic produce, you are supporting organic farming methods, which eliminate the harmful use of chemical fungicides and pesticides.

Some of your favorite conventional vegetables and fruits may be among the most pesticide-laden foods on the market. Check out this list of "Dirty Dozen" fruits and vegetables, and seek out the organic versions. Organic peanut butter and ketchup are other great items to add to your list — pesticide residues are frequently found in conventional peanut butter, and recent research has shown that organic ketchup contains almost double the antioxidants of conventional ketchup.

If you're wondering which kinds of produce have the least pesticide residue, the Environmental Working Group's "Clean Fifteen" includes: avocados, sweet corn, cabbage, sweet peas (frozen), onions, asparagus, eggplant, cauliflower, sweet potatoes, pineapples, mangoes, papaya, kiwi, grapefruit, and cantaloupe.