15, and 16 suggest that limited resources and environmental degradation would have caused armed conflicts in human history.

15和16提示，人类历史上资源减少和环境恶化就会导致武装冲突。

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The study was supported by the National Institute on Aging and the National Institute of Environmental Health Science. The researchers reported no conflicts of interest.

这项研究由国家老龄化研究所和国家环境健康科学研究所赞助。研究者报道没有任何利益的冲突。

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There are clear signs that environmental scarcities could contribute to violent conflicts in many parts of the world.

各种迹象清晰的表明，环境资源的缺乏可能是引发许多地区冲突的原因之一。

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The BBC's Mattia Cabitza in Lima says mining is a huge revenue earner for Peru, but that ongoing social and environmental conflicts are threatening to delay billions of dollars of investment.

BBC: Deadly clash at Peru protest over Barrick gold mine

China Daily says Mr Wen handed in a "proud score sheet" despite outlining a litany of problems left to his successors such as a "conspicuous increase" in social conflicts, environmental degradation and systemic blocks against reform.

BBC: China media: Wen's mixed legacy

The region faces a number of problems including a lack of economic development, environmental pollution, and military conflicts.

BBC: Black Sea strategy