Say,“No bag,thank you.” Whether you’re buying toys,snacks,or clothes,tell the checkout person you don’t need a bag.By carrying your own reusable bag,you’ll help reduce the 100 million plastic bags that each year block sewers(下水道),and get swallowed by whales,sea turtles,and other wildlife.

　　Plant a tree.　3　 They produce oxygen and absorb carbon dioxide(二氧化碳),a gas that animals,including humans,produce naturally as they breathe.But because carbon dioxide also comes from cars and factories,there is too much of it in the atmosphere,which is contributing to global warming.If everyone planted one tree,those trees would remove a large amount of carbon dioxide from the atmosphere. 

　　4　 Every time you leave a room for more than a minute,turn off the light you’re using.In this way,you save energy and keep greenhouse gases out of the atmosphere. 

　　Try the family challenge!　5　 You and your family can help preserve the waterways by joining others in your community to pick up rubbish. 

　　A.Turn off the light.

　　B.Avoid driving cars.

　　C.Treat them like friends.

　　D.Trees help clean the air we breathe.

　　E.Here are ideas for easy,small things you can do.

　　F.Many streams and rivers are polluted and littered with rubbish.

　　G.Pollution is a growing problem for all the Earth’s oceans and its wildlife,including whales.

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