[单项选择]
Global Warming
Few people now question the reality of global warming and its effects on the world’s climate. Many scientists
(51) the blame for reeent natural disasters on the increase
(52) the world’s temperatures and are convinced that, more than
(53) before, the Earth is at
(54) from the forces of the wind, rain and sun.
(55) to them, global warming is making extreme weather events,
(56) as hurricanes and droughts, even more
(57) and causing sea levels all around the world to
(58) Environmental groups are putting
(59) on governments to take action to reduce the
(60) of carbon dioxide which is given
(61) by factories and power plants, thus attacking the problem at its source. They are in
(62) of more money being spent on research into solar, wind and wave energy devices, which could then replace ex
A. threat
B. danger
C. risk
D. harm