The more important goal is using interactive learning to discover the cause of the decline and compare it to issues we face today—natural disasters, environmental problems, and war.

更重要的目标是利用互动式学习来发现减少的原因，并将其与我们今天面临的问题——自然灾害、环境问题和战争——进行比较。

youdao

I concluded that the profit from burgers is more than offset by the damage they cause in health problems and environmental harm.

我得出的结论是，汉堡对身体健康和环保事业所造成的危害超过了它所带来的利润。

youdao

Since the current world food shortage is trend-driven, the environmental trends that cause it must be reversed.

由于当前世界粮食短缺是环境趋势导致的，因此必须扭转这一趋势。

youdao

Studies support the theory that there are several causes, instead of a single environmental cause or genetic problem.

VOA: special.2009.01.06

For years, doctors believed that the cause of multiple sclerosis was environmental.

VOA: special.2009.01.06

The U.S.Environmental Protection Agency,or EPA, lists stormwater as the primary cause of water pollution in the United States, and encourages local communities to develop management plans to treat run-off before it pollutes their rivers, lakes or streams.

VOA: standard.2010.08.04

Time is money, and money is a scarce resource that is badly needed in the environmental cause.

FORBES: Time Wasters, Time Savers

The government has made a few rhetorical nods to the environmental cause, for example by promising to protect the embattled sturgeon, the fish that produces caviare.

ECONOMIST: Russia

Fearing the environmental damage the paper plants might cause, Argentines on the river have been demanding a halt to their construction.

ECONOMIST: Argentina and Uruguay