The global population has already doubled since 1950 to about 7 billion today.
The world in figures
9.3bn The world's population by 2050, according to UN estimates. The global population has already doubled since 1950 to about 7 billion today. By 2050, two-thirds of the population will live in cities. The population in poor countries has increased more than fourfold since 1961. Forty per cent of the world's population today now lives within 100 kilometres of the shoreline.
80% The energy supply accounted for by fossil fuels. Energy consumption worldwide rose by 5.6 per cent in 2010 and is set to double by 2030. After fossil fuels, renewables make up about 13 per cent. Biofuels are the biggest contributor in renewable energy. In rural Africa, 85 per cent of the population relies on biomass for energy.
$2 The amount 43 per cent of the developing world live on per day. However, the number of people living on $1.25 a day fell from 1.9 billion in 1990 to 1.28 billion in 2008, or 22 per cent of the developing world. For the first time in 20 years, the proportion of Africans living in extreme poverty has fallen, with 47 per cent living below this threshold in 2008 compared with 52 per cent in 2005.
2.5bn People in need of decent sanitation. Nearly one in 10 persons has yet to gain access to "improved" drinking water, as defined under the UN's 2015 development goals. About 1.4 billion people have no mains electricity.
20% The mammals that face extinction, according to the International Union for Conservation of Nature's "Red List" of threatened species. Also on that list are 30 per cent of amphibians, 12 per cent of known birds, and more than a quarter of reef-building corals.
13m The amount of hectares of forests that disappear each year, accounting for the third biggest single source of greenhouse gas.
13.1bn The waste in tonnes that the world will produce annually by 2050, a fifth more than today.
70% The increase in demand for food by 2050, which will lead to a nearly 20 per cent increase in global agricultural water consumption. One person in seven suffers from malnourishment. Between 2000 and 2010, 203 million hectares of land were transferred to foreign control, especially to China, Gulf countries and wealthy countries eager for food security and biofuels. Two-thirds of the transactions were in Africa and 14 per cent in Asia.
Dh1.15tn Money spent on subsidies for fossil fuels in 2009. A tax of 0.005 per cent on foreign exchange trading could raise Dh146.8bn a year in additional aid for poor countries, which in 2010 stood at Dh477.1bn