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No longer in the pink

Corals are comeback creatures. As the world froze and melted and sea levels rose and fell over 30,000 years, Australia’s Great Barrier Reef, which is roughly the size of Italy, died and revived five times. But now, thanks to human activity, corals face the most complex condition they have yet had to deal with.

According to the Intergovernmental Panel on Climate change, a rise in global temperatures of 1.5oC could cause coral reefs to decline 70-90%. The planet is about 1oC hotter than in the 19th century and its seas are becoming warmer, stormier and more acidic. This is already affecting relations between corals and the single-celled algae (海藻), which give them their color. When waters become unusually warm, algae float away, leaving reefs a ghostly white. This “bleaching” is happening five times as often as it did in the 1970s. Meanwhile the changing chemistry of the oceans makes it harder for corals to form their structures.

If corals go, divers and marine biologists are not the only people who will miss them. Reefs take up only a percent of the sea floor, but support a quarter of the planet’s fish diversity. The fish that reefs shelter are especially valuable to their poorest human neighbors, many of whom depend on them as a source of protein. Roughly an eighth of the world’s population lives within 100km of a reef. Corals also protect 150,000km of shoreline in more than 100 countries and territories from the oceans buffeting, as well as generating billions of dollars in tourism revenue.

Coral systems must adapt if they are to survive. They need protection from local sources of harm. Their eco-systems suffer from waste from farms, building sites and blast fishing. Governments need to impose tighter rules on these industrials, such as tougher local building codes, and to put more effort into enforcing rules against overfishing.

Setting up marine protected areas could also help reefs. Locals who fear for their livelihoods could be given work as rangers with the job of looking after the reserves. Visitors to marine parks can be required to pay a special tax, like what has been done in the Caribbean.

Many reefs that have been damaged could benefit from restoration. Coral’s biodiversity offers hope, because the same coral will grow differently under different conditions. Corals of the western Pacific, for example, can withstand higher temperatures than the same species in the eastern Pacific, which proves a way forward to encourage corals to grow in new spots.

1.According to the passage, what may happen to corals when waters become warm?

A.Turning white B.Getting pink

C.Being active D.Becoming colorful

2.According to the passage,corals can _______ the changing in the nature.

A.live with B.escape from

C.die in D.recovery from

3.According to Paragraph 4, the governments should__________.

A.carry out stricter rules on industries around the coast

B.call on volunteers to look after the marine reserves

C.reduce the number of visitors to the marine parks

D.ban people from fishing in the coral reef areas

4.What’s the main purpose of the passage?

A.To present the importance of coral reef to the world.

B.To introduce the severe effect on coral reef brought by climate change.

C.To propose governments to take action immediately to save coral reef.

D.To attract more attention to coral reef protection.

高三英语阅读理解中等难度题

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