Our driveway is super cracked and every once in a while a weed will poke up out of a crack. I don't think that is what they mean by "going green," so a solution is necessary.
Create your own weed killer--kill a little green and save a little green all at once.
Pour 4 oz. of lemon juice in a 1 qt. spray bottle and fill the rest of the way with white vinegar. Swirl, then spray directly on the weeds. The acids in the vinegar and the lemon juice combine to eat away at the stems and dry the roots to deter those green intruders for good.