Questionsare based on the following passage. When you think about the growth of human popu

Questionsare based on the following passage.

When you think about the growth of human population over the last century or so， it is alltoo easy to imagine it merely as an increase in the number of humans. But as we（36）， so doall the things associated with us，（37）our livestock （家畜）. At present， there are about 1.5 bil-lion cattle and domestic buffalo and about 1.7 billion sheep and goats. With pigs and poultry，they form. a（38）part of our enormous biological footprint upon this planet.

Just how enormous was not really apparent until the（39）of a new report， called "Live-stock"s Long Shadow，" by the Food and Agriculture Organisation of the United Nations.

Consider these numbers. Global livestock grazing （放牧） and feed production use "30percent of the land surface of the planet." Livestock —— which consume more food thanthey（40）—— also compete directly with humans for water. And the drive to expand grazingland destroys more biologically sensitive terrain， rain forests（41）， than anything else.

But what is even more striking， and alarming， is that livestock are（42）for about 18 per-cent of the global warming effect， more than transportation"s（43）. The culprits （罪魁祸首）are methane —— the natural result of bovine digestion —— and the nitrogen emitted by manure.

Deforestation of grazing land adds to the effect.

There are no easy trade-offs when it comes to global warming —— such as cutting back oncattle to make room for cars. The human（44）for meat is certainly not about to end anytimesoon. As "Livestock"s Long Shadow" makes clear， our health and the health of the planet de-pend on pushing livestock production in more（45）directions.

A．publication

B．waste

C．contribution

D．certainly

E. yield

F. multiply

G. critical

H. passion

I . concerning

J . available

K. liable

L. sustainable

K. responsible

N. including

O.especially

第（36）题应填__________

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