Dump. (Para. 3)
dump: vt. drop carelessly, throw away
They kept dumping their garbage in the woods until the local police came. 警察到来之前， 他们一直在往树林里倒拉圾。
The factories dumped so much waste material into the rivers that the water became polluted. 这些工厂把那么多的废物排入河中，以致于河水受到了污染。
dump: n. place for dumping waste垃圾场