We all have those cans of paint in the garage or basement. They're great for touching up walls when they get chipped or scratched up. But when you repaint a wall and no longer need the color beneath it, or you haven't painted in several years, you should consider responsibly ridding yourself of the old paint. Try patching a wall you painted years ago with the paint in the can, and you'll see that it's not a perfect match. The paint on the wall has dulled. And if you repaint a wall, the chances of ever using that old paint color again are very slim. Keep newer paints for touch-up, but the rest can go. Visit Earth911.com to find a place that will safely dispose of the old paint for you.