my million dollar idea

Al is always trying to come up with million dollar ideas. Well, I've got one. But since I can't execute it, you're welcome to steal it if you think you can figure this one out.

It's snowing today. Again. And as I take a break from studying (an all-nighter, I'm afraid) there is already another 1/2 inch of snow on the ground. But as I was walking past the business building at my school, I noticed that the flagstones around the entrance were snow-free--and dry, not showing any evidence of being touched by snow. I know that they don't have janitors, grounds workers, or little invisible elves carting that snow away the moment the flakes touch the ground, so I thought, "What is it about this entrance? Do they have snow repellent or something on these stones?"

Now I know there is probably something in the physical composition of those flagstones that cause them to be snow-free when the rest of the world is covered in the stuff, and frankly, I'm not interested in learning it. I'm not a science person and it wouldn't make any sense to me. That's also the reason I can't invent snow repellent, which is my million dollar idea. But wouldn't it be great if someone could invent a snow repellent that made the snow float around--and land off to the side of--pavement and cars? It'd be like an invisible force that surrounded the first few feet above them and the first inch or two around them, a force that only snow couldn't penetrate (okay, maybe ice, too--except at ice rinks). Think of the possibilities: no shoveling, no road crews (sorry for the job loss), no salt ruining our cars and roads, no sand making everything look dirty and muddy, no scraping your car off before driving away, and a lot fewer accidents.

How about it--taking me up on this million dollar idea, anyone?