Flood is a kind of Natural Disaster which hurts or even kills people and animals. Flood can also damage houses, factories, public places, etc. There are some efforts to minimize flood. First, we must not cut down the trees in the forest illegally, because it can cause many disasters for human beings, one of which is a flood. Second, We should plant any kinds of trees in our house, in the barren area or on the side of the road, so the water can be absorbed easily by the root of the plants. Besides, in this way we get many advantages such as to decrease air pollution and to support the 'Go Green' program for Global Warming and Climate Change on our earth. The last is that we must not throw away rubbish. By doing those simple efforts, we can minimize the disasters and participate in the preservation of our environment. So, we must keep our environment.