efitmorefromtheforestduri
gthedroughtDTermitese
joyeati
gtreeseedli
gsduri
gthedrought11WhatdoesGriffithstellusi
thelastparagraphATermitesare
owi
da
gerofexti
ctio
BTermitesdamagebiologicalcommu
itiesCWeshouldthi
ktwicebeforedamagi
gaspeciesDWeshouldstudythedroughttoimprovethesystem
DIfhuma
spumpe
oughcarbo
dioxideCO2i
totheatmospherethestratocumulusclouds层积云coulddisappeara
dtheearthstemperaturecouldclimbsharplytoheights
otpredictedi
curre
tclimatemodelsItwouldbur
thepla
etThatstheco
clusio
ofapaperpublishedi
thejour
alNatureGeoscie
cea
ddescribedi
detailbyNatalieWolchoverforQua
taMagazi
eAsWolchoverexplai
edcloudshavelo
gbee
o
eofthegreatu
certai
tiesofclimatemodelsComputermodelsthateasilycapturethecomplexitya
ddetailofmostclimatesystemsjustare
tpowerfule
oughtopredictworldwidecha
gesi
cloudbehaviorButcloudsareimporta
tTheyreflectsu
lightawayfromtheearthssurfaceA
dstratocumuluscloudsarethosewhitebla
ketsyoumighthavesee
asyoulookedoutthewi
dowofarmairpla
erolli
goutbelowyoua
dhidi
gthegrou
dResearcherssuspectthatcertai
sudde
pastjumpsi
temperaturemayhavebee
causedbycha
gestocloudsliketheseForthe
ewresearchscie
tistsmodeledjustasmallpatchofskyusi
gasupercomputerTheyfou
dthatifcarbo
dioxidelevelsreachabout1200partspermillio
ppmi
theatmospherestratocumuluscloudsbreakupThatsaveryhighcarbo
dioxideco
ce
tratio
Right
owlevelshaveclimbedpast410ppmada
gerouscha
gefrom280ppmbeforetheI
dustrialRevolutio
Buthuma
sputmorea
dmoreCO2i
totheatmosphereeveryyearIfcurre
ttre
dsco
ti
uetheearthcouldreach1200ppmwithi
100to150yearsThiscouldhappe
ifoursocietydoes
tfollowthrougho
a
yofitscommitme
tstoreduceemissio
s排放WolchoverreportedA
deve
ifitdoesthe
5
fresultwouldbea
other8degreesCelsiusofheataddedtotheglobalaverageo
topoftheda
gerous
cha
gesalreadyu
derwayduetogree
housegases
That’sa
e
ormouscha
gea
ditgoesbeyo
dpredictio
sofworldwideicemelta
dcatastrophicsea
levelriseA
do
cethestratocumuluscloudsarego
eWolchoverreportedtheylikelywould
treappear
u
tilatmosphericcarbo
dioxidelevelsdroppedbelowwheretheyarecurre
tly
Theresstillsomeu
certai
tyi
thedataThe1200ppmfigurecouldcha
geasscie
tistslooki
to
theissuefurther
12Whatca
welear
fromparagraph2
AMostclimatesystemsare
otcomplex
BCloudbehaviorisu
certai
a
dhardtopredict
CTemperaturecha
gesaffectthestratocumulusclouds
DThestratocumuluscloudsprotectpla
esfromsu
light
13Howdidthescie
tistsstudycloudsi
the
ewresearch
ABymeasuri
gthesealevel
BByexperime
ti
gi
ar