About the only thing worse then spraying any of the glyphosate products around to control "weeds" is spraying any petroleum product around to do the same thing. Aside from the environmental harm that does it also creates an extreme fire hazard while you are spraying.

Glyphosate products are listed in Ontario as class 7 herbicides and while you cannot use them for simply eliminating cosmetic "weeds" they can be used, if properly documented, to control noxious "weeds".
Ontario, on Earth Day 2009, banned the cosmetic use of all herbicides, pesticides, and fungicides, one of the best things any provincial (state) government has done in many years.

I wish the US would do the same thing. There are too many that use the products with out a clue that the harm for some out weight the look of a space.

Sorry I prest enter too soon. it should be 'the harm caused by some'

White vinegar works well.