The-world-is-in-danger英语九下沪教版第三单元课件

TheworldisindangerCuttingdownforests•Everyyear,wedestroynature___cuttingdownhugeareasofforests.Thismakesthegreenhouseeffect____(bad)becausetreestake_CO2andproduceoxygen.____(cut)downtreesalsodestroysthehomesoftheanimals_liveinourforests,and______(cause)thesurfaceofthesoileasilydestroyed_____(be)byrain.Thiscanresult_floodsandeven____(much)damage__theenvironment.