Over the past months, terrible things have occurred around the world: the ground under the German town of Erftstadt is torn apart by flood waters; Lytton in British Columbia is burned from the map just a day after setting an extremely high temperature record; cars float like dead fish through the streets-turned-canals in the Chinese city of Zhengzhou. All the world feels at risk and there seem no safe places to hide. Research has found that all these have something to do with greenhouse-gas emission (排放), which has produced a planet more than 1℃ (1.8°F) warmer than the 18^th century.

With emissions continuing, it will get worse. If temperatures rise by 3℃ in the coming decades, large parts of the tropics (热带地区) risk becoming too hot for outdoor work. Coral reefs and the sea life depending on them will disappear and so will the Amazon rainforest. Severe harvest failures will be common. Ice sheets in Antarctica and Greenland will shrink (收缩) past the point of no return, promising sea rises measured not in millimetres, as today’s are, but in metres.

Some cautious adaptations have been put into effect. However, cutting emissions alone is far from enough. it’s also wise to study the most amazing form of adaptation: solar geoengineering.

Research over the past 15 years has suggested that solar geoengineering might significantly reduce some of the harms from greenhouse warming. It seeks to make clouds or particle layers (粒子层) in the atmosphere a bit more mirror-like. reflecting away some sunlight. It cannot provide a straightforward equal and opposite response to greenhouse gas warming; it will tend, for example. to reduce precipitation (降水) more than temperature, potentially changing rainfall patterns to ease the problem of global warming.

【小题1】What does the underlined “these” refer to in Paragraph 1?

A．The severe risks the world is facing.

B．The terrible floods the earth is experiencing.

C．The extreme weather the planet is undergoing.

D．The unsafe places the emission has created.

【小题2】How does the author explain the consequences of the emission in Paragraph 2?

A．By listing examples.	B．By using figures.
C．By asking questions.	D．By making comparisons.

【小题3】What do we know about solar geoengineering?

A．It will change the global temperature patterns.

B．It may cut greenhouse gas emissions significantly.

C．It will provide a direct response to global temperature.

D．It may prevent sunlight from reaching the earth directly.

【小题4】Which of the following is a suitable title for the text?

A．Global warming—bad news for the world.

B．Cautious Adaptations—good news for the world.

C．Solar Geoengineering—new solutions to global warming.

D．Greenhouse gas emission—familiar problems with global warming.