高中人教版 (2019)Unit 3 Environmental Protection课文配套课件ppt

这是一份高中人教版 (2019)Unit 3 Environmental Protection课文配套课件ppt，共60页。PPT课件主要包含了课前·基础认知，课堂·重难突破，随 堂 训 练，词 汇 认 知，阅 读 自 测，词 汇 精 讲，学以致用 ，句 型 剖 析，选词填空 ，growth 等内容，欢迎下载使用。

重点单词1.　smg　 n.烟雾(烟与雾混合的空气污染物)  2.　vlume　 n.量;体积;(成套书籍中的)一卷 3.　garbage　 n.垃圾;废物 4.　enterprise　 n.公司;企业;事业 5.　restre　 vt.恢复;使复原;修复 6.　dzen　 n.(一)打;十二个 7.　fine　 vt.对……处以罚款 
8.　campaign　 n.运动;战役　vi.& vt.参加运动;领导运动 9.tlerate vt. 忍受;包容;容许 10.　agenda　 n.议程表;议事日程 
词汇拓展1.riginate vi.& vt.起源;发源;创立→　rigin　 n.起源;出身→　riginal　 adj.原来的;起初的;有独创性的;原作的 2.cnservatin n.对(环境、文物等)保护;保持→　cnserve　 vt.节省;节约;保护;保存;保藏 3.regulatin n.章程;规章制度→　regulate　 vt.约束,控制,管理;调节 
4.dispsal n.去掉;清除;处理→　dispse　 vt.布置;安排;使倾向于;消除;处理 5.inspectin n.检查;查看;视察→　inspect　 vt.检查;查看;视察 
重点短语1.deal 　with　 处理;处置;对付;应付 2.cntribute t 促成;有助于;对……做出贡献;向……捐款 3.end 　up　最终成为;最后处于 4.dzens 　f　 许多;很多 5.carry 　ut　 进行;执行;实施;落实;贯彻;实现 6.　in　 additin此外;另外;又 7. 　in　 effect 有效;实际上 8.ther 　than　 除……以外;不同;不同于 
Step 1　Fast Reading一、快速浏览课文,将段落与其主旨大意相匹配1.Paragraph 1　A.The effect f turism n water 2B.Measures taken t deal with water 3C.Intrducing the tpic f water pllutin f the Li 4D.Initiatives t tackle water pllutin acrss the cuntry.
Step 2　Detailed Reading二、仔细阅读课文,选择最佳答案1.What's the passage mainly abut?A.The beauty f the Li sme turists did led t the water measures t reduce water pllutin in the Li ways t increase crp prductin.
2.Which f the fllwing statements is NOT true accrding t the passage?A.The chemicals have caused a decrease in the number f fish reputatin f the Li River has a negative effect n the river's water media has a gd effect n encuraging greater use f clean lcal gvernment did nthing t prtect the water quality in the Li River.
3.We can learn frm the last tw paragraphs that 　　　. A.peple can d nthing t reduce water pllutin in the Li RiverB.turists are nt allwed t visit the Li RiverC.the lcal authrities never inspect the Li RiverD.sme measures have been taken t reduce water pllutin in the Li River
1.【教材原文】The expressin “smg” riginated in Britain and means a cmbinatin f “smke” and “fg”.(page 30)“雾霾”这种表达起源于英国,意思是“烟”和“雾”的结合。
考点riginate vi.& vt.起源;发源;创立riginate frm/in 发源于;起源于riginate with 由……发起riginatr n.创始人;首次提出者rigin n.起源;起因riginal adj.起初的;原来的riginally adv.原来;起初
语境领悟(1)All theries riginate frm practice and in turn serve practice.任何理论都来源于实践,反过来为实践服务。(2)The idea riginated with a wman wh wrte the music.这一思想最早是由创作该曲的一位女士提出来的。(3)He is knwn as the riginatr f a lng-running TV series.他作为电视连续剧的创始人而出名。
(4)(2022·北京卷) Frm bserving his mum and frm his desire t give kids better drink ptins,he came up with his riginal mdel fr the Fun Bttle.通过观察他的妈妈,以及他想给孩子们更好的饮料选择,他想出了他最初的乐趣瓶模型。(5)(2021·全国甲卷)It was built riginally t prtect the city in the Tang dynasty and has nw been cmpletely restred.在唐朝,最开始建造它是为了保护这座城市,现在它已经完全修复了。
温馨提示riginate frm,riginate in,riginate with表示根源时,with用于人,in不用于人,frm两者皆可。
学以致用单句语法填空(1)They bth riginate frm/in flk life,mythlgy and literary wrks. (2)It shws details such as the riginatr (riginate) f the task and the peple wh can wrk n it. (3)The questin f the rigin (riginate)f the universe is still htly debated by scientists. (4)While he had riginally (rigin) travelled in rder t study,traveling had becme an end in itself. 
2.【教材原文】Many tur bats cntributed t the prblem t.(page 32)游船数量众多,也是导致这一问题出现的原因之一。考点cntribute t促成;有助于;对……做出贡献;向……捐款cntribute vt.& vi.捐献,捐赠;是……的原因之一;增加;撰稿;讲话,发表意见make a cntributin t 向……捐款;对……做出贡献
语境领悟(1)(2022·新高考全国Ⅰ卷)It cntributes much t cultural diversity.它对文化多样性有很大贡献。(2)Chinese peple have cntributed a lt t the wrld peace.中国人民对世界和平做出了巨大贡献。(3)It was generus f her t cntribute such a large sum.她很大方,捐助了这么一大笔钱。
(4)This successful man made a lt f cntributins t all kinds f educatinal institutins in China.这位成功人士给中国的各种教育机构做了很多次捐赠。
学以致用单句语法填空(1)This can cntribute little 　t　 the slutin f the prblem. (2)Exercise cntributes t 　imprving　(imprve) yur health. 
完成句子(3)他们认识到他们的饮食习惯也可能是导致他们心脏疾病的原因。They recgnised that their eating habits might have als　cntributed　 　t　 　their　 　heart　 　diseases　. 
(4)希腊人对世界文明做出了巨大贡献。The Greeks have 　made　 a　 great　 cntributin　 　t　 wrld civilisatin. 
3.【教材原文】Lcal fficials were cncerned that the pllutin was damaging the natural envirnment and felt that urgent steps shuld be taken t restre the river's riginal beauty.(page 32)地方官员担心水污染对自然环境的破坏,认为必须采取紧急措施以恢复漓江昔日的美丽。
考点restre vt.恢复;使复原;修复;归还restre t 恢复到……restre sb/sth t sth 使某人/某物恢复原状restre belief/faith in sth 恢复对……的信任restratin n.整修;修复;(规章制度等的)恢复
语境领悟(1)This beautiful ld building has been restred t its frmer glry.这座美丽的老建筑物已恢复了昔日的壮观。(2)We hpe t restre the garden t its frmer glry (= make it as beautiful as it used t be).我们想把这花园变得和过去一样美丽。
(3)He has dne its best t restre ur belief in his hnesty,but many peple still have their dubts.他竭尽全力让我们重新相信他的诚实,但仍有许多人持怀疑态度。(4)The restratin f the castle tk a year and cst a lt f mney.修复城堡花了一年时间和大量的钱。
学以致用单句语法填空(1)I feel quite restred 　t　 health after my hliday. (2)Several bks lst frm the cupbard 　have been restred　(restre) nw. 
完成句子(3)最近军队被调来重整秩序。The army has recently been brught in t 　restre　 　rder　.(4)她的工作是修复旧画。Her jb is 　restring　 　ld　 　paintings　. 
4.【教材原文】Dzens f plluting enterprises were clsed r mved.(page 32)几十家污染企业被关闭或搬迁。考点dzens f许多;很多dzen n.&det.(一)打;十二个by the dzen 成打地
语境领悟(1)The typhn destryed dzens f huses.台风毁坏了许多间房屋。(2)He gave me a dzen rses fr my birthday.他送给我一打玫瑰作为生日礼物。(3)Eggs are sld by the dzen in this supermarket.在这个超市,鸡蛋是按打卖的。(4)He bught three dzen bttles f wine.他买了36瓶葡萄酒。
温馨提示(1)dzen前有数词或者具有数词意义的词,如:a,many,several, sme,a few等修饰限制时,dzen要用单数形式,后面接可数名词复数,且名词前通常无需用介词f。 I bught three dzen eggs yesterday. 我昨天买了三打鸡蛋。 (2)表示“部分与整体”的关系时,dzen即使是单数形式,也要加f,这时f后面多是一个加有限定词(如:these,thse,the,my,Tm's等)的复数名词或代词。
I want tw dzen f these sup spns. 我想买这些汤匙中的两打。 I want tw dzen f them. 我要它们中的两打。
学以致用单句语法填空(1)I have heard f the stry 　dzens　(dzen) f times. (2)Surprisingly,in that bkstre,bks are sld by the dzen. 完成句子(2)他已在这儿住了24年了。He has lived here fr　tw　 　dzen　 　years　. (3)他的花园里有好几十棵树。There are　dzens　 　f　 　trees　 in his garden. 
5.【教材原文】 New rules were als intrduced regarding tur bat rutes and garbage dispsal methds.(page 32)同时也出台了关于游船路线和垃圾处理方法的新规定。考点dispsal n.去掉;清除;处理at ne's dispsal 任某人处理;供某人任意使用;由某人自行支配the dispsal f... ……的处理;……的处置权dispse v.排列;布置;安排;使倾向于;使有意于;使易于dispse f sb/sth应付/解决/处理某人(某事)
语境领悟(1)Yu must cnsider hw t better utilize the resurces at yur dispsal.你们必须考虑如何更好地利用所掌握的资源。(2)The cmmander dispsed his frces s as t make an attack n the enemy.司令官对他的部队做了部署以便进攻敌军。(3)The justices have been arguing abut hw the case shuld be dispsed f.法官们就如何处理该案一直争论不休。
学以致用单句语法填空(1)Yu had better discuss with her the dispsal f the furniture. (2)They dispse f the city's waste in the sea. 
完成句子(3)他将有一辆汽车归他使用一个月。He will have a car at his dispsal fr the whle mnth.(4)你解决了那个问题,可算是帮了我们一个大忙。Yu did us a great favur by dispsing f that prblem. 
6.【教材原文】At the same time,they started t carry ut inspectins regularly and fine turist rganisatins fr abuses.(page 33)与此同时,他们开始定期检查,并且对旅游机构的违规行为进行处罚。
考点carry ut进行;执行;实施;落实;贯彻;实现carry n(with/ding) sth继续(做)某事be/get carried away 变得很激动;失去自制力carry ff成功地对付;赢得;获得(奖品、荣誉等)成功完成;顺利实现;帮助……渡过难关
语境领悟(1)He has carried ut extensive research int renewable energy surces.他已经对再生能源进行了广泛研究。(2)Yu'll wear yurself ut if yu carry n wrking s hard.你要是继续这样拼命工作,身体会吃不消的。(3)He has better sense than t be carried away by success.以他的见识,不至于被胜利冲昏头脑。
(4)Carry ff the rich knwledge,leave behind the beautiful mind.把丰富的知识带走,把美好的心灵留下。(5)The warmth and strength f their relatinship carried them thrugh difficult times.他们互相关心,关系牢固,这才熬过了艰难岁月。
学以致用完成句子(1)决定执行计划,他们做了周密的准备。Determined t carry ut the plan ,they made very careful preparatins. (2)她决定继续她的教育。She is determined t carry n with her educatin .(3)他的勇气和决心使他渡过了难关。His curage and determinatin carried him thrugh . 
(4)她在今年的比赛中打得很好,人们预计她可以再次赢得所有的大奖。She is playing s well this year that peple expect her t carry ff all the big prizes again. 
7.【教材原文】Where des the issue ccur?(page 33)问题出在哪里?考点ccur vi. 发生;出现;存在于;出现在;被想到ccur t sb 某人想到It ccurred t sb t d... 某人突然想到做……It ccurred t sb that...某人想到……ccurrence n.发生;发生的事情
语境领悟(1)He said the traffic peak ccurred in the first five hurs f yesterday.他说交通高峰期出现在昨天的前五个小时。(2)We were n a walk in the cuntry when the idea first ccurred t us.我们是在乡间散步时第一次有这种想法的。(3)It seldm ccurred t them t wander a bit,t take a mment t see what's arund them.他们很少想到去游荡,花点时间看看周围的事物。
(4)(2022·北京卷) Tracking f 150 bichemicals in fd has been imprtant in revealing the relatinships between calries,sugar,fat and the ccurrence f cmmn diseases.对食物中150种生化物质的追踪对于揭示热量、糖、脂肪和常见疾病的发生之间的关系非常重要。
学以致用单句语法填空(1)I was ging alng the street lking fr a place t park when the accident 　ccurred　(ccur). (2)It ccurred 　t　 me that I shuld give the reprt t my manager. 
完成句子(3)他突然想起要去拜访一位老朋友。　It　 　ccurred　 　t　 　me　 that he shuld visit an ld friend f his. 
8.【教材原文】The villagers culd n lnger tlerate the situatin.(page 34)村民们再也不能忍受这种情况了。考点tlerate vt.忍受;包容;容许tlerate (ding) sth容忍(做)某事tlerance n.容忍;宽容have n tlerance f/fr sth不能容忍某事/物tlerant adj.宽容的;容忍的be tlerant f/twards sb/sth忍受、宽容某人/某事
语境领悟(1)The bdy cannt tlerate such large amunts f radiatin.身体不能承受那么大量的辐射。(2)Chinese parents wn't tlerate their children kncking bwls with chpsticks when having dinner.中国的父母不容许他们的孩子在就餐时用筷子敲碗。(3)They need t be tlerant f different pints f view.他们需要包容不同的观点。
(4)My biggest weakness was my lack f tlerance fr any errr.我最大的缺点是我不能容忍任何错误。
学以致用单句语法填空(1)Instead f blaming the child wh had brken the vase,she gave him a tlerant (tlerate) smile and let him g. (2)When he reached the kingdm,he fund the new surrundings difficult t tlerate (tlerate). (3)An excellent teacher wn't tlerate cheating (cheat) in the examinatins. (4)Cmpared t the elderly,many yungsters have a very limited tlerance (tlerate) t thers. 
9.【教材原文】Wh else ther than the students learn frm the wrkshps?(page 36)除了学生们以外,还有谁在工作坊里学习?考点ther than 除……以外;不同;不同于
语境领悟(1)(2021·全国乙卷)If yu can start the cnversatin with a questin ther than “What d yu d fr a living?”,yu'll be able t get a lt mre interesting cnversatin ut f whmever it is yu're talking t.如果你可以用一个除了“你靠什么谋生?”的问题开始对话,无论你和谁谈话,你都能得到更多有趣的对话。(2)Other than ne sister,she has n clse relatives.除了有一个姐姐,她没有亲戚了。
(3)The dctr advised abut many things ther than medicine.除了药,那位医生还就许多事情给出了建议。(4)The truth is quite ther than what yu think.事实和你想的完全不同。(5)I brrwed sme bks ther than nvels.我借了几本书,都不是小说。
完成句子(1)除了工作之外,你还有什么特别的爱好吗?D yu have any special interests 　ther　 　than 　yur jb? (2)除了乘小船,你无法去那里。Yu can't get there 　ther　　than　 by　　bat　.
句型转换(3)Everyne here can g there except yu.→Everyne here can g there ther than yu. 
1.【教材原文】When summarising,yu need t be as cncise as pssible and use yur wn wrds.(page 31)总结时,你需要尽可能简洁,并用你自己的话。
句法分析When summarising相当于When yu summarise,在句中用作时间状语。在时间、条件、让步或方式等状语从句中,如果从句主语与主句主语一致,常把主语省略而采用“连词+动词-ing形式或动词-ed形式”的结构。如果是主动关系用动词-ing形式,如果是被动关系用动词-ed形式。
语境领悟(1)He wrte his greatest nvel while he was wrking/while wrking n a ship.在一艘船上工作期间,他写出了他最伟大的小说。(2)I wn't g t her birthday party unless I am invited/unless invited.除非受到邀请,否则我不会去参加她的生日宴会。(3)If it is heated/If heated,water can be turned int vapur.如果加热,水会变成水蒸气。
温馨提示在有些表示时间、条件、让步或方式等的状语从句中,如果主语是it,谓语又包含be动词时,也可以把it和be动词省略。 When (it is) necessary,call 110 fr help. 必要的时候,拨打110求助。
学以致用单句语法填空(1)Dn't mentin this while 　talking　(talk) t him. (2)When 　leaving　(leave) the airprt,they waved again and again t us. (3)Althugh 　built　(build) befre the war,the engine is still in perfect rder. 
句型转换(4)When he was ding his hmewrk,he heard the kncking at the dr.→　When　 　ding　 　his　 　hmewrk　,he heard the kncking at the dr. (5)Even if I am invited,I wn't attend the party.→　Even　 　if　 　invited　,I wn't attend the party.(6)If ging there by air,we'll have t pay twice the fare.→　If　 　we　 　g　 　there　 　by　 　air　, we'll have t pay twice the fare. 
2.【教材原文】Previusly,water quality in the Li River had suffered greatly frm an increasing vlume f turists,many f whm frequently threw garbage int the river.(page 32)过去,游客数量的增加使漓江的水质严重恶化,许多游客常常将垃圾抛入江中。
句法分析本句中使用“名词/代词/数词/形容词最高级等+介词+关系代词”引导定语从句。在“名词/代词/数词/形容词最高级等+介词+关系代词”结构引导的定语从句中,先行词为物时,关系代词为which;但若先行词为人,则关系代词用whm;若关系代词在从句中作定语,则关系代词用whse。
语境领悟(1)We've tested three hundred types f bts,nne f which is cmpletely waterprf.我们已经测试过300种靴子,没有一种是完全防水的。(2)I met the fruit-pickers,several f whm were university students.我遇到了摘水果的人们,其中有几个人是大学生。
(3)He went with a grup f peple,few f whm were crrectly equipped fr such a climb.他和一队人一起去了,其中没有几个人配有进行这样一次登山的适当装备。
学以致用单句语法填空(1)There were abut 50 freign students in ur schl,mst f 　whm　 were frm Germany. (2)I have many friends,sme f 　whm　 are businessmen. (3)The building,the walls f 　which　 are white,is the tallest in ur city. 
句型转换(4)He has tw sns and bth f them are wrkers.→He has tw sns,　bth　 　f　 　whm　 are wrkers. (5)Mr Smith lives in a big huse.Its windws face suth.→Mr Smith lives in a big huse,　the　 　windws　 　f　 　which　 face suth. 
(6)I was given three bks n cking,and I really enjyed tw f them.→I was given three bks n cking,　tw　 　f　 　which　 I really enjyed. 
3.【教材原文】Water pllutin levels increased,with mre husehld and cmmercial waste ending up in the river.(page 32)越来越多的生活和商业垃圾最终流入江中,加重了水污染程度。
句法分析with mre husehld and cmmercial waste ending up in the river为“with+宾语+动词-ing形式做宾语补足语”的复合结构做原因状语。with复合结构的构成是:with+宾语+宾语补足语。此结构可做定语,也可做状语,表示伴随、方式、条件、原因等。
其具体构成如下:(1)with+宾语+介词短语(2)with+宾语+形容词/副词/名词(3)with+宾语+动词-ing形式(表示主动或动作正在进行)(4)with+宾语+动词-ed形式(表示被动或动作已完成)(5)with+宾语+动词不定式(表示动作将要发生)
语境领悟(1)A yung girl went in,with a bk in her hand.一个年轻女孩进来了,她手里拿着一本书。(2)Tian'anmen Square lks even mre beautiful with all lights n.所有的灯都亮着,天安门广场显得更加漂亮。(3)With s much wrk filling in his mind,he culdn't sleep well.他脑子里满是工作,睡不好觉。
(4)The man was brught in with his hands tied behind his back.这个人被带了进来,双手被绑在背后。(5)With the teacher t help me,I will make great prgress.有老师帮助我,我将取得很大的进步。
学以致用单句语法填空(1)We went thrugh the frest withut any difficulty with the guide 　leading　(lead) us. (2)All the afternn he wrked with the dr 　lcked　(lck). (3)With many new wrds 　t remember　(remember),she will stay up tnight. 
句型转换(4)He lay n his back,and his eyes were lking up int the sky.→He lay n his back,　with　 his　 eyes　 lking　 up int the sky. (5)She had t walk hme because her bike had been stlen.→She had t walk hme 　with　 her　 bike　 stlen　.(6)Dn't speak when yur muth is full.→Dn't speak 　with　 　yur　 　muth　 　full　. 
4.【教材原文】With these measures,it is believed that the beauty f the Li River will be preserved fr generatins t cme.(page 33)有了这些举措,相信漓江之美将得到保护并世代相传。句法分析it is believed that...句型意为“据信……;被认为……”。与it is believed that...结构类似的还有it is said/thught/reprted/ hped/expected/annunced/declared/warned/decided that...等。
语境领悟(1)It is believed that paper was first invented by Chinese.纸被公认为是中国人最先发明的。(2)It is said that seven peple were killed in the accident.据说在这次事故中有七人遇难。(3)It was thught that nly three peple in the wrld culd understand it at that time.人们认为当时世界上只有3个人能够理解这一点。
(4)It is reprted that children all ver China have been ffered free educatin.据报道,全中国的儿童都已经得到了免费教育。(5)It is hped that the ld man will live t 90 years ld.这位老人有希望活到90岁。
温馨提示it is believed/said/thught/reprted that...等句型常可与sb/sth be believed/said/thught/reprted t d sth等句型转换。 It is said that he knws thirteen languages./He is said t knw thirteen languages. 据说他懂13种语言。
学以致用单句语法填空(1)It is said 　that　 three hundred peple were invited t attend the pening ceremny. (2)It 　is believed　(believe) that Australia was cnnected t Suth America millins f years ag. (3)A ship is reprted 　t have struck　(strike) sme rcks ff the east cast and sank. 
句型转换(4)The bk was said t have been translated int English.→　It　 　was　 　said　 　that　 the bk had been translated int English. (5)It is said that the ppulatin f males is larger than that f females in that cuntry.→The ppulatin f males 　is　 　said　 　t　 　be　 larger than that f females in that cuntry. 
5.【教材原文】Is it likely t be slved cmpletely?(page 33)有可能彻底解决吗?句法分析be likely t d sth句型意为“可能会做某事;有希望做某事”,其中likely为形容词,在句中做表语。
语境领悟(1)He is nt likely t cme.他不见得会来。(2)Our arms and legs are likely t grw weaker in the future.将来我们的四肢有可能会弱化。
温馨提示likely用作形容词,意为“可能的;有希望的”,也常用于it is likely that...句型。 It's likely that he will need an peratin. 他有可能需要做手术。
完成句子(1)我们可能会赢。　It　 　is　 　likely 　　that　we will win. (2)明天我可能很忙。I'm 　likely　 　t　 be very busy tmrrw. 
句型转换(3)He is likely t be late.→　It　 　is　 　likely　 　that　 he will be late. (4)It is likely that water shrtages will happen with the wrld ppulatin increasing.→Water shrtages 　are　 　likely　 　t　 happen with the wrld ppulatin increasing. 
一、单词拼写1.New rads are being built t cpe with the increased vlume (量) f traffic. 2.Can yu take ut the garbage (垃圾) t the dustbin when yu g t schl this mrning? 3.He is still invlved in vluntary wrk prmting lcal enterprise (企业). 4.The unin has prpsed new regulatins (规章制度) t cntrl the wrking hurs. 
5.We must carry n the public health campaign (运动) t reduce disease and imprve health cnditin. 6.The schl is strict abut students' schlwrk and cannt tlerate (容许) cheating in exams. 7.She is an envirnmentalist and has cntributed a lt t the lcal envirnmental cnservatin (保护). 8.They are determined t carry n with the enterprise (事业) fr the benefit f future generatins. 9.The safe dispsal (处理) f nuclear waste is a majr prblem,which aruses many cuntries' cncern. 
carry ut　end up　in effect　dzens f　cntribute t
1.Mst imprtantly,I met dzens f nice peple there and made many excellent friends. 2.I'm firmly cnvinced f the significance f hnesty,which will cntribute t building a warm and harmnius sciety. 
3.Later,he realised if he went n like that,he wuld end upachieving nthing. 4.With yur permissin,I will have the prject carried ut as sn as pssible. 5.The decisin was taken yesterday and will remain in effectuntil next year. 
三、课文语篇填空The beautiful Li River is ne f the 1._______________ (famus) turist destinatins,but the 2.__________(grw)in turism has had negative effects n the river's water quality. This reprt lks at the prblem f water pllutin and sme actins that have been taken t deal with it. 
Water quality in the Li River had suffered 3.__________ (great)frm an increasing vlume f turists,many f 4.__________frequently threw garbage int the river.Many tur bats cntributed 5.__________the prblem t.The lcal ppulatin rse rapidly,as well as 6.__________number f cmmercial and industrial enterprises.Water pllutin levels increased,with mre husehld and cmmercial waste ending up in the river.T feed mre peple,mre chemicals 7.__________(use) t increase crp prductin.These chemicals led t severe water quality issues,8.__________ (cause) a decrease in the number f fish species.