Unit+6+Earth+First+Developing+ideas 高中英語外研版（2019）必修第二冊(cè)

外研版(2019)英語必修二Unit

6Earth

firstDevelopingideas(Reading)Learningobjectives1.Tohaveageneralknowledgeof

what'sreallygreeninour

daily

life.2.Tolearntheroleandfunctionof

subheadings.3.Tolearnsomekeywordsandexpressionsinthis

lesson.

Iead-in

Pre-r

eading

While-reading

Post-readin

g

Lead-inLookatthequestionsabout“greenliving”andtickyouranswers.1Which

shopping

bag

is

more

environmentally

friendly?□Aplasticbag.

□Apaperbag.√

Neitherof

these.2What

should

you

do

to

save

energy

when

leaving

your

home?□Turn

off

a

device.力Unplug

a

device.□Neither

of

these.3Whatfoodisbetterfortheenvironment?□Foodproducedneartowhereyoulive.√Foodproducedfarfromwhereyoulive.□

It

depends.4

Which

uses

less

water?□Takingabath.

□Taking

a

shower.

?

It

depends.

Nowworkingroupsandseeif

otherpeople

shareyourideas.oLearningto

learnAssubheadingsexpandonthemainheadingortitle,they

canbeslightlylongerthanthemainheading.Although

noteveryparagraphneedsasubheading,theycanbeskimmedtogivethereaderanoverallunderstandingof

thecontentof

a

text.

Pre-readingRead

the

four

subheadings

in

the

passage

and

decide

ifthey

aretrue

or

false.The

nreadthepassageandcheckyour

answers.While-readingSkimmingWhat'sthemainideaof

thepassage?It

discusses

some

common“green

truths”which

have

been

shown

to

be

half

trueorevencompletely

false

.Whenyouturnoffadevice,itstopsusingpower.When

we

turn

offa

device,suchastelevision,itgoesintostand-bymode.Devices

in

this

mode

stillusepower,and

olderdevices

in

stand-by

modecanuseevenmore.Thishappensbecauseelectricitycontinues

to

leak

from

the

device,even

when

it

isturned“off”.Tomakesureyourapplianceis

infact

off,remove

the

plug

from

its

power

supply.Papershoppingbags

arebetterthanplasticones.Plastic

bags

cause

litter

and

are

a

danger

towildanimals,whichmistakethemforfood.Ittakeshundreds

of

years

forplastictobreak

down,but

much

less

timeforpaper.Becauseof

this,peoplethinkpaperbagsarethe

better

environmentalchoice.However,making

apaperbagusesfourtimesasmuch

energyasmakingaplasticbagandupto

threetimestheamountof

water.The

process

also

produces

more

greenhouse

gases.Infact,bothkinds

of

bags

arebad

forthe

environment.So,take

a

reusablebag

with

you

when

you

go

shopping.It'sbetter

to

take

a

showerthan

abath.It

depends

onhow

longyou

spend

intheshower

and

how

large

your

bath

is.Ifyouspendmorethan

eightminutes

in

a

shower,you'lluseasmuchwaterasin

abath-about

50

litres

ofwater.Therefore,the

key

is

to

keepyour

showertimeas

short

aspossible.Environmental

awareness

isnowpart

ofdailylife.But

it'sworth

checking

common

ideasand

opinionsto

seewhat's

really

green.Eatinglocalfoodis

good

fortheenvironment.Itseemslikecommon

sense:eatinglocal

foodshouldbebetterfortheenvironment,becauseitdoesnotneedtobetransportedlongdistancesandkeptcoldduringtransport.Unfortunately,itisnotthat

simple.It

is

the

production

of

food,notits

transport,that

uses

most

of

the

energyandproducesmostof

thegreenhousegases.Insomecases,localproducemighthaveusedmoreenergyandproducedmoregreenhousegasesthanproduce

grown

a

longway

away-eventakingintoaccountitstransport.CAUSES1Making

apaper

bag

uses

more

energy

andwater

than

making

a

plastic

bag.It

alsoproducesmoregreenhousegases.2Devices

turnedoffgo

intostand-by

mode

andstilluse

power:3

Local

produce

sometimes

might

use

moreenergyand

producemoregreenhousegasesthan

producegrownalongwayaway—even

takingintoaccountits

transport.4Ifyouspendmorethaneightminutesina

shower;you'lluseasmuchwaterasin

abath—about50litresof

water.EFFECTs)Paperbags

arenotgood

for

the

environment.Turningoff

adevicewon't

stopit

from

usingpower.Eatinglocalfoodisn'talwaysbetter

for

the

environment.It'snotalwaysbettertotakea

showerthan

a

bath.

While-readingReadtheeffectsandcompletethecausesof

these

according

to

the

passage.1

Which

of

the“green

truths”surprises

you

most?Give

your

reasons.Whenyouturnoff

adevice,itstopsusingpower.Usually

I

just

turn

off

mytelevision

before

going

out,thinking

it

is

a

safe

and

green

way.I

don't

knowit's

still

a

waste

of

energy.2

Are

you

aware

of

any

other“green

truths”that

are

not

true?Share

themwith

the

class.Bike-sharing

is

a

green

method

of

transportation

and

provides

a

user-friendlyexperience.However,it

causesthe

energytobewastedif

thebikes

are

thrownaway

by

the

roadside.Post-readingThink&SharePost-readingThink&Share3

How“green”are

you?Share

your“green

actions”with

the

class.Iusuallytrytosaveenergyandwaterinmy

daily

life.For

example,Ialwaysturnoff

thelightswhenIleavearoom.Iwalkorride

abike

instead

of

takingabusorataxi.Itakea

clothbagwhen

I

go

shopping.4Whatcanyoudotobecome“greener”?Icanstopusingthethingsthatcanbeusedonly

once.I

canunplugtheTVsetbeforeIgoout.Ican

stoppeoplefromproducingpower

from

coal.Post-readingWorkingroups.Giveatalkaboutoneof

the“green

truths”in

the

passage.1

Use

these

questions

to

help

plan

your

talk.Which“green

truth”are

you

going

to

talk

about?Why

do

people

believe

it

is“green”?Why

is

it

not

completely

true?What

can

you

do

to

become“greener”?2

Organise

your

talk

following

the

steps

below.Start

your

talk

by

stating

the

topic.Describe

your

chosen“green

truth”in

more

detail.Explain

why

it

is

not

completely“green”

.Endyourtalkby

encouragingyour

audience

to

become“greener”

.3

Give

your

talk

to

the

class.········Post-readingSampleI'm

going

to

talk

about

one

of

the“green

truths”—Paper

shopping

bagsare

better

than

plastic

ones.As

we

all

know,plastic

bags

cause

litter

anda