In Cleveland they salt the shit out of every surface someone might walk on, ever. Every spring they replace all of the grass that was within about a foot of the sidewalks, since it has been salted to death.
Fuck living where it snows. Seriously. Snow lives up in the mountains.
wait...holy what? I just watched that again. I dunno man. No one shoveled that. If salt is the explanation, that is to much salt. In Ottawa we salt sidewalks, but for grip, not to melt snow, we shovel it. That is going to ruin your soil. Good thing this doesn't happen often.