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Most scientists
believe the warming trend is mainly caused by human activity, especially the
use of fossil fuels(矿物燃料) and the cutting down of
forests. Skeptics(怀疑论者) say global warming is part of a
natural cycle of climate change.
In Copenhagen,
experts and officials alike are putting the emphasis on what people and
governments can do to cut the emission of greenhouse gasses.
Scientists say a 25 to 40 percent cut in
carbon-dioxide emissions is needed to control global warming. The European
Union, China, and India have already pledged(保证)
reductions. The United States is waiting for Congressional(国会的) approval for a proposal put forward by the Obama administration.
Barack Obama,
President of the United
States said, “Each of us must do what we can
when we can to grow our economies without endangering our planet -- and we must
all do it together. We must seize the opportunity to make Copenhagen a significant step forward in the
global fight against climate change..”70. The main focus of the scientists' research was ______________.
A. mutation of human genes B. development of the human stomach
C. why milk drinking started D. where milk drinking first started
D
Materials for all activities will be provided. Register before 27 October 09 to get a free gift! Bring your kids down to Katong CC and experience learning the fun way! |
