Even with stringent limits, says the M. I. T. group, Americans would consume only 2 percent less in 2050 than they would have in the absence of emission limits.

MIT小组的研究表明，即使实施严苛的限制，美国人在2050年的消费量只会比没有排放限制的消费量，少2个百分点。

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But environmental groups and some doctors say regulations still aren't stringent enough and the practice can pollute ground water.

NPR: AP: NY Fracking Held As Cuomo, RFK Jr. Talk Health

He argued that standards at the time weren't as stringent.

WSJ: SAT Scandal Shines Harsh Light on South Korean Academics

It caused the French Government to ban meat and bone meal in animal feed, take T-bone steaks off menus and institute more stringent health tests for cattle.

CNN: France urges better beef labelling