Do you find that our earth的答案!

Do you find that our earth的答案!
Do you find that our earth 1______ （become）warmer and warmer?It is very dangerous to us．More and more people 2______ （realize）that it is a very important problem 3______ （stop） the earth from getting warm．What can we do to solve the problem?
Everyone 4______ （know）that more and more CO2 in the air 5______ （make）the earth get warmer and warmer,so reducing CO2 which 6______ （give off）into the air can help us solve the problem．
When we use the air conditioning,if we 7 ______ （turn）up two degrees in summer and turn down two degrees in winter,we can 8 ______．（reduce）2000 I bs CO2 in a year．It is helpful to reduce CO2 if we go to work or go to school by bike or on foot．9 ______ （protect）the forests is
also very important．We should plant more trees and 10 ______（look after）the young trees very well．
DO the things we should do to protect your environment at once!