Passover: Burning Chametz: What To Do with Chametz

If you own any chametz, you must burn some of it in order to fulfill the commandment of burning chametz: this is a mitzva from the Torah
Note If you have too much chametz to conveniently burn, you may throw some of the chametz into the garbage (but not into your own garbage can, only a public one--where permitted).
You must throw the chametz into the garbage before you burn the remainder. You may, alternatively, throw the chametz into a public area or pond (if permitted by the owner or by law).