[填空题]

Paying for Nature

A. How much are the birds of heaven worth How about the lilies of the field Or clean air and water, verdant forests and untouched grassland, healthy coral reefs and lush mangroves By the environmentalist’s accounting, they’re invaluable because nature has a worth all its own. But to business, untouched nature typically hasn’t had a value—at least not one that could be put in a ledger(账簿).
B. Until now, many green—and a growing chorus of corporate suits—are arguing that nature in its own right provides economically valuable services that benefit business. A virgin forest is pleasant to look at, of course, but it also prevents soil erosion and improves water quality at no cost—valuable if you happen to own a beverage (饮料) plant downstream that depends on clean water. That same forest might provide a habitat for bees, which can pollinate(授粉) plants in the surrounding cropland—a vital f

[填空题]

Paying for Nature

A. How much are the birds of heaven worth How about the lilies of the field Or clean air and water, verdant forests and untouched grassland, healthy coral reefs and lush mangroves By the environmentalist’s accounting, they’re invaluable because nature has a worth all its own. But to business, untouched nature typically hasn’t had a value—at least not one that could be put in a ledger(账簿).
B. Until now, many green—and a growing chorus of corporate suits—are arguing that nature in its own right provides economically valuable services that benefit business. A virgin forest is pleasant to look at, of course, but it also prevents soil erosion and improves water quality at no cost—valuable if you happen to own a beverage (饮料) plant downstream that depends on clean water. That same forest might provide a habitat for bees, which can pollinate(授粉) plants in the surrounding cropland—a vital f

[填空题]Because people have been paying too much attention to the sulphur particles and other pollutants, they overlooked another problem, global warming.

[填空题]People have been paying too much attention to the sulphur particles and other pollutants, so they overlooked another problem, global warming.

[单项选择]How many birds can the man see
A. None at all.
B. Some more.
C. Quite a few.

[单项选择]
How many birds are there in the picture

[单项选择]
Understanding how nature responds to climate change will require monitoring key life cycle event-flowering, the appearance of leaves, the first frog calls of the spring all around the world.
But ecologists can’t be everywhere so they’re turning to non-scientists, sometimes called citizen scientists, for help.
Climate scientists are not present everywhere. Because there are so many places in the world and not enough scientists to observe all of them, they’re asking for your help in observing signs of climate change across the world. The citizen scientist movement encourages ordinary people too observe a very specific research interest--birds, trees, flowers budding, etc. and send their observations to a giant database to be observed by professional scientists. This helps a small number of scientists track a large amount of data that they would never be able to gather on their own. Much like citizen journalists
A. a citizen journalist
B. a citizen scientist
C. a scientist
D. a citizen