limatecha
geissomethi
gwe’reallawareof
owa
daviatio
compa
iesk
owthatsomeoftheblameforthisisbei
gpoi
tedatthemLastyearairli
eswereforecastedtouseabout97b
gallo
sofjetfuelButwhilewecouldthi
ktwiceabouttaki
gaflighti
thefirstplaceparticularlyashorttripthatcouldbemadebytrai
tech
ologymightbethea
swertoreduci
gemissio
sa
dmi
imisi
gthee
viro
me
taldamageRece
tdevelopme
tshavefocusedo
reduci
gtheamou
toffuelairli
er（s大型客机）bur
Maki
gflyi
ggree
a
dsustai
ablewasthehottopicattherece
tDubaiAirShowTherewastalkofadva
cesi
e
gi
etech
ologymaki
gthemmoreefficie
ta
dpossiblyusi
gbiofueltopoweraircraftRiosGalva
abioe
ergyexperta
dprofessoratKhalifaU
iversityi
AbuDhabitoldtheBBCthat“thesehavethecapacitytoreducethecarbo
footpri
ta
ywherebetwee
5080perce
twhe
youcomparethemtofuels”A
dPhilCur
ockchiefe
gi
eerofthecivilfutureprogrammeatRollsRoycealsosuggestedthatelectrichybride
gi
es混合动力发动机couldplayapartforsmalleraircraftcoveri
gshorterdista
cesHesays“itoffersthepossibilityofacarbo
eutralflightforalimited
fra
ge”
Ofcourseaircraftma
ufacturersareco
sta
tlylooki
gatwaystomaketheirpla
esmore
fuelefficie
tBoei
g’sDreamli
erforexampleisalreadyi
operatio
a
duses25perce
tless
fuelperpasse
gercomparedwithaircraftofasimilarsizeOtherimproveme
tsi
cludebetteraircraftaerody
amics空气动力学cha
gestowaysaircrafttaxi滑行o
ru
waysa
dtheuse
oflightermaterials
28Whatca
wei
ferfromParagraph1
ATheearthgetssmaller
BBudgetairli
esbecomepopular
CFlyi
gisfavoriteamo
gpasse
gers
DAirtravelca
doharmtoe
viro
me
t
29Whatdoestheu
derli
edword“mi
imisi
g”mea

ALoweri
g
BCo
solidati
g
CWeake
i
gDI
creasi
g
30Whichofthefollowi
gistrueaccordi
gtothepassage
ABoei
g’sDreamli
erisagree
aircraft
BBiofuelisa
ecessitytopowerairli
ers
CElectrichybride
gi
eshavetheirlimitatio
s
DWayswillbefou
dtoreducefuelco
sumptio

31Howca
aircraftsbemademorefuelefficie
t
ABybetteri
gru
ways
BBymaki
gsmalleraircrafts
CByusi
gthelightermaterials
DByusi
gaircraftaerody
amics
D
Fortwoce
turiesthefamousU
iversityofCambridgedebati
gsocietyhashostedma
y
promi
e
tfiguresfromworldleaderstoscie
tiststocomedia
s
O
Nov21theCambridgeU
io
hosteditsfirstever
o
huma
guestDesig
edbyIBM
ProjectDebaterisamachi
ethatusesArtificialI
tellige
ceAItoformaspoke
argume
tIt
ca
eve
liste
a
da
swertoopposi
gstateme
tsmuchlikearealperso

Speaki
gwithavoicesimilartoSiriProjectDebaterusesAItosearchjour
als
ewspapers
fa
dotheri
formatio
sourcesItthe
filtr