I understand that nano sized particles are being created in the world all the time. Waves smashing water molecules into nano sized particles, tires spinning down the highway losing nano sized rubber bits, even rubbing my hand over the table top will wear off a few nano sized particles of the table top material. Where do they all go? What happens to all those nano sized particles? Won't we eventually end up with a world covered in nano sized particles of everything? How come we're not seeing that happen?