Energy, population, ecological environment and water resource have become the important issue that countries all over the world have generally concerned.

水资源与能源、人口、生态环境等已成为世界各国普遍关注的重大问题。

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The shallow lakes are playing an important role in urban ecological environment, and the eutrophication is the lake's universal issue.

城市浅水湖泊在城市生态环境系统中发挥着重要作用，富营养化是当前湖泊普遍存在的问题。

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As the ecological crisis becomes a global issue, human and nature relation also becomes a research focus of each country's scholars.

随着生态危机成为全球性问题，人与自然关系也成为各国学者们的研究焦点。

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Outside Brazil, the fight for the Amazon is seen largely as an ecological matter, but here it's a social issue.

CNN: The death of Z�� Cl��udio and Maria

Bats transmitting rabies is a difficult issue and the complexity of the spread of this disease strongly relates to an ecological unbalance.

ECONOMIST: Letters