Ecotourism has its origin with the environmental movement of the 1970s.

生态旅游起源于20世纪70年代的环境运动。

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Our continuing failure to deal with the environmental declines that are undermining the world food economy forces me to conclude that such a collapse is possible.

在应对破坏世界粮食经济的环境恶化的过程中，我们的连续失败迫使我得出这样一个结论：这种崩溃是有可能发生的。

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The South Florida nesting population, the largest, has declined by 50% in the last decade, according to Elizabeth Griffin, a marine biologist with the environmental group Oceana.

据环保组织 Oceana 的海洋生物学家格里芬说，过去10年里，数量最多的南佛罗里达海龟数量减少了50%。

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Says Danielle Nierenberg, a senior researcher with the environmental research organization the Worldwatch Institute.

VOA: standard.2010.07.28

So, if you could make automobiles with a high magnesium content, you would reduce the mass, reduce the energy required, and thereby reduce the environmental impact.

所以，如果你能用含镁量,很高的材料来制造手机，你就能减轻手机的质量，减少制造所需能量，因此减轻了对环境的破坏。

麻省理工公开课 - 固态化学导论课程节选

Says David DeGennaro with the Environmental Working Group.

VOA: standard.2010.04.28

By the late 1960s, the United States was confronted with the environmental threat presented by gasoline-powered automobiles.

FORBES: Diamond Lanes: Another Failed Energy / Environmental Policy

Ms. SNIDER: Well, I think for a lot of folks it has to do with the environmental impact.

NPR: Boulder Wrestles with Mega Houses

They reached an agreement with labor, with management, with the environmental groups, to double car mileage in the next few years.

WHITEHOUSE: The White House