Talk about the picturesThey are all wasteful things. We can’t waste energy.waste---wastefulcare---carefulhope---hopefuluse---uesfulIt’s wasteful to throw away glass, metal, and paper.They can be recycled. They are reusable.The river is polluted, andthe ocean is polluted, too.Pollute----pollutionInvent----invention Dicuss---discussionThe air is polluted, too.Forests and homes have goneListen for the followings:The email is from ______________.Zhao Ming studies at _..