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• 綜合測驗
The hole in the ozone layer over Antarctica that protects life on earth from
紫外線
the sun's ultra-violet rays Jis shrinking and will be closed by 2050, according to an
chlorine from chlorofluorocarbons
Australian scientific team. The level of 1
(CFCs) in the atmosphere has begun to fall some 30 years after the hole was first
detected. At its peak, the hole was three times the
2
of Australia.
Developed in the 1930s as a domestic refrigerant, CFCs were added as propellants
to spray cans issued to U.S. troops in World War II. Then they came into common use
in refrigerators, air conditioners and 3.
to
5 current
The ban imposed on CFCs in the 90s under the Montreal Protocol has been proved
4 This successful global endeavor to save the ozone should
efforts under the so-called Kyoto Protocol to curb production of greenhouse gases
which cause global warming. In a world where effective action on climate change is
dreadfully slow, we must hold onto the wins we have and use them to model the future.
AB
(C) eating-ozone (D) eaten-ozone
(C) gap
1 (A) ozone-eating (B) ozone-eaten
(D) size