Even if you're not a savvy environmentalist, you probably know that contaminating your yard with nasty chemicals isn't a good idea, especially if you have kids, pets, or an edible garden nearby. Here's an easy-to-make weed killer that won't hurt the earth but will stop the weeds from growing. All of these ingredients can be found at your local grocery store for only a few bucks. In fact, you may already have all of them in your home. It only takes a few minutes to make the mixture. Then you can get out in your yard and start squirting away.