Here’s a recipe for a great-environmentally friendly and pet-friendly weed killer. Measure 2 cups vinegar, 1/2 cup of salt and 1/2 cup of dish washing liquid into a plastic spray bottle. Mix well by shaking. Use with care, as you do not want to spray any flowers or shrubs with the weed killer. The vinegar kills the weeds, while the salt keeps them from regrowing.

Read more at: How To Make Eco-friendly Weed Killer | eHow.com http://www.ehow.com/how_5008656_make-ecofriendly-weed-killer.html#ixzz216X9FBKC

If you prefer to use a chemical product, Canadian Tire sells an environmenally-friendly Round-up in a handy spray bottle that works very well.