 killing thousands of plant species, some of which may have contained vaccines for HIV, cancer, and syphilis. Meanwhile, the guys cutting down the trees are 13-year-old kids who will work night and day for months just to save up enough money to buy a pair of jeans made by child labor in sweatshops. Saving the world isn't easy, but saving a life is. Just one pint of blood can save up to three lives. Visit BloodSaves.com to learn more. This public service announcement was brought to you by the Ad Council.