Money should be invested to bring down the cost of de-salination for people's water supplies as population grows.

BBC: Harrabin's Notes: Population overload?

Rising sea levels, salination of fresh water, droughts, floods... the maths of future climate impacts are inexact, but on a global scale the costs are likely to rise, not fall - and by far more than the costs borne by highly profitable Chinese airlines as they fly inside the EU's climate policy umbrella.

BBC: EU's aviation charge is a drop for China's airlines