原文已被隐藏，你可用 快捷键 - 或点击 显示原文 按钮来查看原文
第1段
1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
该句暂无译文！
2 .Everybody eats. and consumers increasingly try to consider the environmental effects of their food choices.
该句暂无译文！
3 .For example, if you want to eat meat, how do your choices compare?
该句暂无译文！
4 .That's what a group of researchers set out to discover.
该句暂无译文！
5 .And they found that raising one animal is dramatically more environmentally draining than all the others: cows.
该句暂无译文！
6 .The research is in the Proceedings of the National Academy of Sciences.
该句暂无译文！
7 .The scientists noted the challenge in accessing data and creating metrics that can be compared across livestock and to potato, wheat and rice production.
该句暂无译文！
8 .They settled on national data from the U.S.Departments of Agriculture, the Interior and Energy.
该句暂无译文！
9 .The team calculated the production costs by assessing land area, water needs and fertilizer.
该句暂无译文！
10 .They also analyzed greenhouse gas emissions.
该句暂无译文！
11 .Producing pork, poultry, eggs and dairy were between two and six times less efficient than growing potatoes, wheat and rice.
该句暂无译文！
12 .And in the current agricultural system, beef uses 28 times more land, 11 times more water and 6 times more fertilizer than the average of the other categories of livestock.
该句暂无译文！
13 .Cattle ranching also creates five times more greenhouse gas emissions.
该句暂无译文！
14 .The researchers hope this data will help consumers make informed choices and policy makers create systems that can reduce the environmental costs of what we eat.
该句暂无译文！
15 .Thanks for the minute, for Scientific American's 60-Second Science.I'm Cynthia Graber.
该句暂无译文！