俗话说，支持是我们武装自己的武器，而了解很多的百科知识，非常有助于我们在社会上和不同的人打交道。从而获得一些人脉资源。

急需百科知识竞赛主持语...在线等!悬赏50分

Globalnbsp;Shortagenbsp;ofnbsp;Freshnbsp;Waternbsp;Peoplenbsp;oftennbsp;thinknbsp;thatnbsp;waternbsp;willnbsp;nevernbsp;benbsp;usednbsp;up.Therenbsp;isnbsp;plentynbsp;ofnbsp;water,sucnbsp;hnbsp;asnbsp;rain,waternbsp;fromnbsp;thenbsp;riversnbsp;andnbsp;wells,Itnbsp;seemsnbsp;asnbsp;ifnbsp;waternbsp;isnbsp;alwaysnbsp;availabnbsp;lenbsp;aroundnbsp;usnbsp;andnbsp;wenbsp;nevernbsp;havenbsp;tonbsp;worrynbsp;aboutnbsp;waternbsp;shortage.nbsp;Innbsp;factnbsp;waternbsp;isnbsp;rathernbsp;limitednbsp;onnbsp;thenbsp;earth.Withnbsp;thenbsp;rapidnbsp;increasenbsp;ofnbsp;populatinbsp;onnbsp;andnbsp;fastnbsp;developmentnbsp;ofnbsp;industries,waternbsp;isnbsp;morenbsp;needednbsp;thannbsp;before.Atnbsp;thenbsp;sanbsp;menbsp;time,anbsp;largenbsp;amountnbsp;ofnbsp;waternbsp;hasnbsp;beennbsp;pollutednbsp;andnbsp;wastednbsp;everynbsp;day.Somenbsp;bignbsp;citiesnbsp;innbsp;Chinanbsp;arenbsp;facingnbsp;thenbsp;problemnbsp;ofnbsp;waternbsp;shortagenbsp;already.There,waternbsp;supnbsp;lynbsp;isnbsp;controllednbsp;andnbsp;industrynbsp;hasnbsp;beennbsp;restrained.nbsp;Whatnbsp;shouldnbsp;wenbsp;donbsp;aboutnbsp;thenbsp;waternbsp;shortage?Inbsp;think,first,thenbsp;peoplenbsp;shouldnbsp;benbsp;manbsp;denbsp;awarenbsp;ofnbsp;thenbsp;realnbsp;situationnbsp;aboutnbsp;thenbsp;water.Everyonenbsp;shouldnbsp;consciouslynbsp;savenbsp;onnbsp;waternbsp;andnbsp;certainnbsp;lawnbsp;shouldnbsp;benbsp;madenbsp;thatnbsp;nonbsp;waternbsp;willnbsp;benbsp;polluted.Wenbsp;havenbsp;tnbsp;onbsp;protectnbsp;thenbsp;existingnbsp;waternbsp;resourcesnbsp;andnbsp;developnbsp;newnbsp;ones.Innbsp;thisnbsp;waynbsp;Ibelievenbsp;thatnbsp;ournbsp;citiesnbsp;willnbsp;benbsp;thirstynbsp;fornbsp;waternbsp;innbsp;thenbsp;future.nbsp;Today,nbsp;pollutionnbsp;hasnbsp;becomenbsp;anbsp;verynbsp;seriousnbsp;problem.nbsp;Allnbsp;formsnbsp;ofnbsp;pollutionnbsp;donbsp;harmnbsp;tonbsp;mannbsp;andnbsp;animals,nbsp;suchnbsp;asnbsp;airnbsp;pollution,nbsp;waternbsp;pollution,nbsp;soilnbsp;pollutionnbsp;andnbsp;sonbsp;on.nbsp;Generallynbsp;speaking,nbsp;Pollutionnbsp;mainlynbsp;comesnbsp;fromnbsp;factories.nbsp;Eachnbsp;day,nbsp;chemicalsnbsp;innbsp;thenbsp;smokenbsp;fromnbsp;factoriesnbsp;causenbsp;anbsp;lotnbsp;ofnbsp;damage.nbsp;Waternbsp;pollutionnbsp;isnbsp;alsonbsp;causednbsp;bynbsp;wastenbsp;fromnbsp;factories.nbsp;Allnbsp;ofnbsp;thesenbsp;cannbsp;donbsp;harmnbsp;tonbsp;people‘snbsp;health.nbsp;Nownbsp;peoplenbsp;havenbsp;donenbsp;somethingnbsp;tonbsp;preventnbsp;pollution,nbsp;butnbsp;thenbsp;situationnbsp;isnbsp;stillnbsp;serious;nbsp;wenbsp;hopenbsp;scientistsnbsp;willnbsp;findnbsp;somenbsp;newnbsp;methodsnbsp;tonbsp;solvenbsp;thisnbsp;problem.nbsp;Nowadays,nbsp;thenbsp;environmentalnbsp;protectionnbsp;isnbsp;becomingnbsp;onenbsp;ofnbsp;thenbsp;mostnbsp;importantnbsp;issuesnbsp;innbsp;thenbsp;world.nbsp;Beingnbsp;onenbsp;ofnbsp;thenbsp;membersnbsp;ofnbsp;ournbsp;society,nbsp;whatnbsp;shallnbsp;wenbsp;donbsp;tonbsp;protectnbsp;thenbsp;environment?nbsp;First,nbsp;stopnbsp;usingnbsp;plasticnbsp;bags,nbsp;boxe