Australia has endured its worst drought in modern history in the past ten years. Water supplies in some farming areas have fallen by half.

近十年来，澳洲遭遇了近代最严重的干旱，有些农田地区的水源短缺了一半。

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Although Latin America saw only half the average GDP growth of emerging Asia over the past ten years, its poverty rate fell by 30%.

ECONOMIST: An unequal continent is becoming less so

America has cut in half its sulphur emissions (the key component of acid rain, the global warming of its day) over the past ten years by imposing mandatory caps with tradable allocations.

ECONOMIST: Buttonwood