高中英语外研版 (2019)必修 第二册Unit 6 Earth first图文ppt课件

这是一份高中英语外研版 (2019)必修 第二册Unit 6 Earth first图文ppt课件，共30页。PPT课件主要包含了完成课后相关练习等内容，欢迎下载使用。
Develping ideas
Lk at the questins abut “green living” and tick yur answers.1　Which shpping bag is mre envirnmentally friendly?□ A plastic bag. □ A paper bag. □ Neither f these.2　What shuld yu d t save energy when leaving yur hme?□ Turn ff a device. □ Unplug a device. □ Neither f these.3　What fd is better fr the envirnment?□ Fd prduced near t where yu live.□ Fd prduced far frm where yu live. □ It depends.4　Which uses less water?□ Taking a bath. □ Taking a shwer. □ It depends.Nw wrk in grups and see if ther peple share yur ideas.
Read the fur subheadings in the passage and decide if they are true r false. Then read the passage and check yur answers.
Mst f us are aware that we must take care f the envirnment, and the majrity f us take steps t save energy and reduce waste and pllutin. But recently, sme“green truths”have been shwn t be nly half true, r even cmpletely false. Here are sme cmmn nes. Which are really green?
Paper shpping bags are better than plastic nes.
Plastic bags cause litter and are a danger t wild animals, which mistake them fr fd. It takes hundreds f years fr plastic t break dwn, but much less time fr paper. Because f this, peple think paper bags are the better envirnmental chice.
Hwever, making a paper bag uses fur times as much energy as making a plastic bag and up t three times the amunt f water. The prcess als prduces mre greenhuse gases.
In fact, bth kinds f bags are bad fr the envirnment. S, take a reusable bag with yu when yu g shpping.
When yu turn ff a device, it stps using pwer.
When we turn ff a device, such as televisin, it ges int stand-by mde. Devices in this mde still use pwer, and lder devices in stand-by mde can use even mre. This happens because electricity cntinues t leak frm the device, even when it is turned “ff”. T make sure yur appliance is in fact ff, remve the plug frm its pwer supply.
Eating lcal fd is gd fr the envirnment.
It seems like cmmn sense: eating lcal fd shuld be better fr the envirnment, because it des nt need t be transprted lng distances and kept cld during transprt. Unfrtunately, it is nt that simple. It is the prductin f fd, nt its transprt, that uses mst f the energy and prduces mst f the greenhuse gases. In sme cases, lcal prduce might have used mre energy and prduced mre greenhuse gases than prduce grwn a lng way away - even taking int accunt its transprt.
It’s better t take a shwer than a bath.
It depends n hw lng yu spend in the shwer and hw large yur bath is. If yu spend mre than eight minutes in a shwer, yu’ll use as much water as in a bath - abut 50 litres f water. Therefre, the key is t keep yur shwer time as shrt as pssible.
Envirnmental awareness is nw part f daily life. But it’s wrth checking cmmn ideas and pinins t see what's really green.
Read the effects and cmplete the causes f these accrding t the passage.
1 Making a paper bag uses mre energy and water than making a plastic bag. It als prduces mre greenhuse gases.
Paper bags are nt gd fr the envirnment.
Turning ff a device wn’t stp it frm using pwer.
Devices turned ff g int stand-by mde and still use pwer.
Eating lcal fd isn’t always better fr the envirnment.
It’s nt always better t take a shwer than a bath.
Lcal prduce smetimes might use mre energy and prduce mre greenhuse gases than prduce grwn a lng way away—even taking int accunt its transprt.
If yu spend mre than eight minutes in a shwer, yu’ll use as much water as in a bath—abut 50 litres f water.
Think & Share
1 Which f the “green truths” surprises yu mst? Give yur reasns.2 Are yu aware f any ther “green truths” that are nt true? Share them with the class.
When yu turn ff a device, it stps using pwer. Usually I just turn ff my televisin befre ging ut, thinking it is a safe and green way. I dn’t knw it’s still a waste f energy.
Bike-sharing is a green methd f transprtatin and prvides a user-friendly experience. Hwever, it causes the energy t be wasted if the bikes are thrwn away by the radside.
3　Hw “green” are yu? Share yur “green actins” with the class.4　What can yu d t becme “greener”?
I usually try t save energy and water in my daily life. Fr example, I always turn ff the lights when I leave a rm. I walk r ride a bike instead f taking a bus r a taxi. I take a clth bag when I g shpping.
I can stp using the things that can be used nly nce. I can unplug the TV set befre I g ut. I can stp peple frm prducing pwer frm cal.
I’m ging t talk abut ne f the “green truths”— Paper shpping bags are better than plastic nes. As we all knw, plastic bags cause litter and are a danger t wild animals, which mistake them fr fd. It takes hundreds f years fr plastic t break dwn, but much less time fr paper. Because f this, we think paper bags are the better envirnmental chice. Hwever, making a paper bag uses fur times as much energy as making a plastic bag and up t three times the amunt f water. The prcess als prduces mre greenhuse gases. In fact, bth kinds f bags are bad fr the envirnment. S, why nt take a reusable bag t becme “greener” when ging shpping?
Writing a persuasive letter
Dear FriendsWe are writing this letter t call n everyne t take part in the Clear Yur Plate campaign. lt urges peple t save fd by nt wasting anything n the dining table. Yu may nt knw ver 30% f the wrld’s fd is wasted, while many peple in pr areas d nt have enugh t eat. In rder t save fd, we prpse:
1 D nt rder mre than yu need in the schl canteen.2 Order less and take leftver fd hme when dining in restaurants.3 Call n family members and friends t take part in the campaign.
Reducing daily fd waste by just 5% culd save millins f peple frm starvatin. Let’s start ding what we can t make the wrld a greener, cleaner place!With best wishes，Class 8
1　What is the purpse f the letter?2　What is the existing prblem?3　What are the prpsed actins frm Class 8?
The purpse f this letter is t call n everyne t take part in the Clear Yur Plate campaign.
Over 30% f the wrld’s fd is wasted, while many peple in pr areas d nt have enugh t eat.
D nt rder mre than yu need in the schl canteen; rder less and take leftver fd hme when dining in restaurants; call n family members and friends t take part in the campaign.
Wrk in grups. Discuss anther envirnmental issue abut which t write a persuasive letter and make ntes.
Nw write a persuasive letter. Use the expressins in the bx t help yu.
Dear Friends,We are writing this letter t raise yur awareness f the need t prtect ur planet. Yu can help simply by participating in the N Bttled Water campaign. Peple tend t think bttled water is cleaner and mre cnvenient. Hwever, they may nt knw that accrding t scientific research, millins f tns f plastic is used wrldwide t make water bttles each year. The plastic can take hundreds f years t break dwn. If yu are wrried abut the effects f bttled water n the Earth, we wuld like t suggest yu take the fllwing steps：
1 Carry yur water in a sustainable, reusable bttle. In this way, yu dn’t need t buy bttled water.2 If yu have t purchase a plastic bttled beverage, recycle the bttle after use.3 Call n yur family members and friends t take part in this campaign.Everyne is respnsible fr making ur planet cleaner and better by ding what we can. Let’s start NOW.With best wishes,Class 3/10
Presenting ideas
Wrk in grups. Lk at the three items that cntribute t a carbn ftprint. Add any mre yu can think f.
Create a carbn ftprint survey. Think f tw questins and pssible answers fr each tpic. Give each answer a scre frm 1(a lw carbn ftprint) t 3 (a high carbn ftprint).