Climate change is caused by the extremely high levels of dangerous chemicals in the atmosphere, particularly carbon dioxide. We all know the effects could be disastrous, but are we aware of the possible solutions?
Solution one:
Though it sounds crazy, a group of researchers from British universities is making a plan to build a 12-mile pipe, held up by a huge balloon, which would let a lot of chemicals, such as sulphur dioxide (SO2), go into the atmosphere. Surprisingly, there is good science behind the idea. The chemicals would form a protective layer around the earth that would reflect sunlight and so cool the earth, much like the effects of a volcanic eruption.
Cost: around $10 billion a year
Benefits: This plan would produce almost instant results.
Risks: Volcanoes have almost destroy human in the past through the chemicals released in the atmosphere, and the same thing could happen again with this plan.
Solution two: stir up (搅动) the oceans
Intellectual Ventures, which is a company, has planned to build a million plastic tubes, each about 100 meters long, and use them to stir up the ocean. Why, you might be wondering, would we want to do this? Again, the answer is scientifically effective. The bottom of the ocean is almost freezing and by stirring it up, cold water would come to the surface and absorb (吸收) heat and CO2, and so cool the planet.
Cost: tens of millions of dollars
Benefits: This plan is relatively cheap and technically possible new.
Risks: The tubes would possibly destroy sea life, and the plan may not work.
Solution three: stop burning fossil fuels
This is undoubtedly the best solution but is it really likely to happen in the near future?
Cost: unknown
Benefits: It’s a simple and effective plan.
Risks: It may already be too late. Without real action, this plan could just mean “do nothing”.
50. Solution one is most likely to________.
A.pump even more chemicals into the atmosphere |
B.form a protective layer with volcanic eruptions |
C.blow up a balloon to get rid of poisonous chemicals |
D.draw as much sunlight as possible |
51. What can be learned about solution two?
A.It needs more valid scientific experiment. |
B.It aims to cool the warm surface water in the ocean. |
C.It may do harm to animals and plants living in the sea |
D.It is much more expensive to carry out than solution one. |
52. What does the writer think of solution three?
A.It is effective because it will benefit world economy. |
B.Whether it will come true remains to be seen. |
C.Putting it into practice may cost nothing. |
D.Action has been taken to carry it out. |