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环保人士用所谓的“生态足迹” 的概念–即我们每个人需要在这个星球上占有多少面积-来阐述他们的观点。我们显然用了耕地、牧场、森林和渔场来生产食品、纤维和木材,而且我们还需要空间来造房、修路和建设城市。此外,因能源的使用而排放出的废物还需要地面来吸收。将所有这些需求转换成一种实际需求面积的共同单位,这给了我们一个机会把它与地球的生产性面积相比较-从而体会一下我们到底有着怎样的可持续性。


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  1. mahroum18_HAIDAR HAMDANIAFP via Getty Images_iraqprotestfire Haidar Hamdani/AFP via Getty Images

    The Arab World Needs a Brexit Debate

    Sami Mahroum

    The Arab world has witnessed at least one big Brexit-like event every decade since 1948 – and these political, economic, and social ruptures never seem to heal. The impact of these self-inflicted disasters is now painfully evident, and ongoing street protests in several countries suggest that a moment of reckoning may have arrived.

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    Restoring Central Banks’ Credibility

    Larry Hatheway

    The old central-bank playbook of slashing interest rates to spur consumption, investment, and employment has become less effective since the 2008 financial crisis. Yet without effective tools and the public's confidence, central banks will be unable to rise to the occasion when the next recession arrives.

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    The Day After NATO

    Joschka Fischer

    French President Emmanuel Macron has drawn criticism for describing NATO as brain dead and pursuing a rapprochement with Russian President Vladimir Putin. But now that a wayward America could abandon the continent at any moment, Macron's argument for European defense autonomy is difficult to refute.