A 900-word composition entitled Clear Sky Wan Li.

Give us a clean sky, and there are some sights: on the road, garbage is thrown everywhere; In the river, you can see waste water every day; In the air, all kinds of "black dragons" are discharged at will, stinking ... which has brought great harm to our lives! Trees are cut down, as long as the rainstorm comes, water and sediment will form a huge debris flow, and the consequences are unimaginable; "Black Dragon" pollutes the blue sky, making people unable to breathe normally; Some people drank the wastewater from the river, which led to water poisoning ... Isn't this thought-provoking? Facing the increasingly serious environmental pollution, what can we do? When people throw rubbish casually, when people pour waste water into the river, how many people can think that they have destroyed themselves? Therefore, it is imperative to protect the environment! We must control ourselves and not litter, so that we will be less polluted; A variety of trees, more green; Install one more waste water filter, and one more is clean and healthy; Reduce exhaust gas, give us a blue sky ... and make our home clean! Students, let's ...