Vinegar has been used for millennia, and has a rich history. It is especially useful for natural green cleaning, too.
vinegar
World's First 'Food Grade' Organic Weed Killer
(via biz.yahoo.com)
Pharm Solutions Inc. announced EPA Registration for the Bio Chemical "Weed Pharm," the world's first food grade organic herbicide. Weed Pharm, a non selective weed and grass killer, whose active ingredient is 200 grain "food grade" vinegar, has been the project of Pharm Solutions since early 2004.
