Such people, land-rich but cash-poor, may now submit their credits to the state treasury for a full cash refund whenever the state budget is in surplus.

ECONOMIST: Clever ways to save land in the newly populous West

People in rich regions, such as in Europe and North America, consume roughly 900kg of food every year, and per-capita waste is around 115kg a year.

BBC: Play your part in the global food crisis

He sold many state enterprises, including banks, to people such as stockbrokers who had grown rich in the economic recovery of the early 1990s.

ECONOMIST: The politico-biology of Mexico comes apart

People who own such things can be very rich and live very well.

CNN: Why do the Romneys pay so little in taxes?

Yet it is a tangled mess, increasingly reliant on regressive taxes, such as the payroll tax, and full of subsidies that benefit rich people while reducing economic efficiency.

ECONOMIST: The Democrats need to posture less and think harder

However, an analysis of the lives of 5, 000 women born in Britain in March 1958 suggests that short women have larger families than tall ones, an effect that is independent of such factors as the tendency of people from poor families to be shorter than those from rich ones.

ECONOMIST: Short women have more children than tall ones

Q22: If it is true that the actions are too individualistic and best suited to people who live in rich developed countries, why might Al Gore still have developed such a list?

UNESCO: Climate change