Yet there is a dark side to this picture: despite our progress, half of the world's population still suffers, with water services inferior to those available to the ancient Greeks and Romans.
然而，这种情况也有其黑暗的一面：尽管我们取得了进步，世界上仍有一半的人口在受苦，供水服务还不如古希腊和古罗马人。
Yet neither side is addressing the real issue: Germany's rapidly aging population.
然而没有一方讨论到真正的议题：德国迅速老化的人口问题。
Demography is on France's side: its population is growing, whereas Germany has one of the EU's lowest fertility rates.
法国的人口统计中法国占优势：它的人口数量在上升，而德国却是欧盟中最低生育率的国家之一。
The Earth Pulse map, for instance, has a menu on the side that allows users to display information based on metrics such as population, meat consumption and deforestation.
例如，EarthPulse的地图，在其侧面上有一个菜单，允许用户显示数据，如人口、肉类消费和森林破坏等信息。
Prof Sir John Burn, a geneticist at Newcastle University, said: “The problem is, if we recommend something to the whole population, then we will see side effects.
纽卡斯尔大学的遗传学家、教授约翰伯恩爵士说：“问题是，如果我们向全体大众推荐，那么，我们将会看到副作用的。
But some negative side effects have emerged, including a rapidly aging population.
但是随之而来出现了一些负面影响，包括人口的迅速老龄化。
Since it's only necessary for a few young toads or eggs to get though the fence in order to establish population on the other side, the fence is unlikely to be effective.
只要有很小数量的蝌蚪和蔗蜍穿过围栏，它们就可以建立起一个种群。所以，这种围栏的方法是无效的。
Since it's only necessary for a few young toads or eggs to get though the fence in order to establish population on the other side, the fence is unlikely to be effective.
只要有很小数量的蝌蚪和蔗蜍穿过围栏，它们就可以建立起一个种群。所以，这种围栏的方法是无效的。
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