“Fourteen percent of emissions from all sources in Australia are from enteric methane from cattle and sheep,” said Athol Klieve,a senior research scientist with the Queensland state government.
“And if you look at another country such as New Zealand,which has got a much higher agricultural base,they're actually up around 50 percent,” he said.
Researchers say the bacteria also make the digestive process much more efficient and could potentially save millions of dollars in feed costs for farmers.
But it will take researchers at least three years to isolate the bacteria,before they can even start to develop a way of transferring it to cattle and sheep.
Another group of scientists,meanwhile,has suggested Australians should farm fewer cattle and sheep and just eat more kangaroos.
The_idea is controversial(争议),but about 20 percent of health conscious Australians are believed to eat the national symbol already.
“It's low in fat,it's got high protein levels and it's very clean in the sense that basically it's the ultimate free range animal(散养动物),” said Peter Ampt of the University of New South Wales's institute of environmental studies.
1.According to the passage,global warming is now mainly caused by ______.
A.methane
B.carbon dioxide
【2016年高考第二轮复习英语专题(浙江版)升级训练卷八单项填空(附答案)】相关文章:
★ 重庆市2014高考英语阅读理解一轮(精品)训练题(6)附答案
★ 2014高考英语(新人教版)一轮基础训练(8)A、B卷(附答案或解析)
★ 2014高考英语(新人教版)一轮基础训练(17)A、B卷(附答案或解析)
★ 2014高考英语(新人教版)一轮基础训练(6)A、B卷(附答案或解析)
最新
2017-04-24
2017-04-24
2017-04-24
2017-04-24
2017-04-21
2017-04-21