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河北教育出版社八年级|下册Unit8SaveOurWorldConnectedtoNature•Doallthelivingthingsontheplanetdependononeanother.•Whatcanwedoforthenature?Haveyounoticedthiskindofrelationships?Haveyounoticedthiskindofrelationships?Ifthegrassisdestroyed,whatwillhappen?Howtoprotectthenature?•Buildingnaturalreserve(自然保护区)•Plantingtrees•Changeourbadhabitsandbehaviors.Words&expressionsListenandread.Thenaturalworldisfilledwithlivingthings.Livingthingsstartoutweakandsmallandslowlygrowstrongandbig.Youarealivingthing.Eachofyourclassmatesisalivingthing.Flowers,grassandtreesarelivingthings,too.Bees,ants,doves,dogsandcats—thesearealllivingthings.Alllivingthingsneedfoodandwatertogrow.Thinkaboutyourself.Whenyouarehungry,youneedtoeat.Youeatfruit,vegetables,meatandfish.Theycanhelpyougrowbigandstrong.Youdrinkwaterwhenyouarethirsty.Nowthinkaboutatree.Whenatreeishungry,itgetsfoodfromthesoil.Treesdrinkwater,too.Wearedifferentinsomeways,butalllivingthingsareconnected.Weallliveonthesameplanet,andwedependoneachother.Ifwepollutetheriversandoceans,fishmaygetsickorevendie.Somebirdsliveofffish.Ifthebirdseatthesickordeadfish,theymaydieoff.Natureisabalancebetweenallthelivingthingsontheplanet.Ifonespeciesdiesoff,thenanotherspeciesmaydieoff,followedbyanother,andanother...Weshouldrespecttheearthandallthelivingthingsonit.