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到2050年,世界人口将新增25亿,我们怎样才能养活这么多人?联合国估计,我们必须将目前的食物产量翻一番才能满足需求;各国政府也宣称,应该采用新技术并避免浪费。但无论如何节约,世界长期饥饿人口已经达到了10亿;未开垦土地寥寥无几;气候变化加大了很多地区农业生产的难度;海洋鱼类过度捕捞;世界许多地区水资源短缺愈演愈烈。50年前,当世界人口只有如今的大约一半时,
The world population will add 2.5 billion people by 2050 and how can we feed so many people? The United Nations estimates that we have to double our current food production to meet demand. Governments also claim that new technologies should be adopted and wastage avoided. But in any case saving, the world’s long-term hunger population has reached 1 billion; few uncultivated land; climate change has increased the difficulty of agricultural production in many areas; overfishing of marine fish; water shortage in many parts of the world intensified. Fifty years ago, when the world’s population was only about half today,