57. What is said about global warming in the first paragraph?

A)      It may not prove an environmental crisis at all       B) It is an issue requiring world wide commitments

C)  Serious steps have been taken to avoid or stop it     D) Very little will be done to bring it under control

58. According to the author’s understanding, what is Al Gore’s view on global warming?

A)      It is a reality both people and politicians are unaware of   B) It is a phenomenon that causes us many inconveniences

C)  It is a problem that can be solved once it is recognized    D) It is an area we actually have little knowledge about

59. Greenhouse emissions will more than double by 2050 because of _________ .

A)      economic growth                                  B) wasteful use of energy

C)  The widening gap between the rich and poor            D) the rapid advances of science and technology

60. The author believes that, since the signing of the Kyoto Protocol, _________ .

A)      politicians have started to do something to better the situation

B)      few nations have adopted real tough measures to limit energy use

C)      reductions in energy consumption have greatly cut back global warming

D)      international cooperation has contribute to solving environmental problems

61. What is the message the author intends to c