My childhood experiment actually comes in handy! I can confirm at the least that planting half of the same batch of seeds close to a road's (the tarmac's) edge

My childhood experiment actually comes in handy! I can confirm at the least that planting half of the same batch of seeds close to a road's (the tarmac's) edge next to it, and in a forest, my grass seeds grew much worse next to the road. Also I was told to never eat berries growing from a bush close to a road since they are more dirty.