 Driving off two indigenous tribes, hundreds of endangered animals, 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 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.