ability of future generations to meet their needs (resource depletion, global warming, etc.).
A - Resource depletion and overconsumption:
In developed countries, people produce and consume more than necessary. The means of production have reached such a performance as their role subsistence gave way to the consumer, replacing the need for pleasure and desire. Developing countries such as China, India, Russia and the South countries aspire to our standard of living, using the same models (Evan-Jones M. 2011). Economic output in some cases leads to disturbances in the ecological balance, due to the overexploitation of natural resources, greenhouse gas emissions (fossil fuels), over-pumping (water), surlabourage (arable land), overgrazing (plant resources ), fishing (fishery resources). Increase the production of material goods or transport (in response to population growth, for example) can exacerbate these disturbances (World Resources Institute, 1995). These effects are particularly noticeable since the 2000s in the plains of northern China, for example, which is starved of water as a result of economic activity in a very strong growth since the 1980s (Sedghi A. 2012).
B - Greenhouse gas emissions:
The global warming come from the greenhouse gas emissions which bring climate change. Concentrations of greenhouse gases in the atmosphere have increased since the nineteenth century. The phenomenon is due to human activities, such as the massive use of fossil fuels in a few decades, significant amounts of carbon dioxide released into the atmosphere from the carbon stored in the basement since the Paleozoic era. Increasing the concentration of CO2 in the atmosphere which results can be a factor in global warming. In 2007 (Walsh B. 2011), the Intergovernmental Panel on Climate Change (IPCC) says that the man seems to be, with a probability of about 90%, responsible for climate change (IPCC, 2012).
C - Water and air pollution:
Water pollution is a major issue in the developing countries such as China. China is facing a situation more difficult for water resources, as industrialization and urbanization of the country growing water demand on the rise, said Hu Siyi, Chinese vice Minister of Water Resources. Water scarcity, pollution of rivers and the deterioration of the aquatic ecology are particularly important and could threaten the country's sustainable development (Xinghua, 2012). Apart from water pollution is the most serious air. Large urban centres such as Beijing, Shanghai, and Hong Kong saw their fleet swell to saturation. The WHO estimates that air pollution causes more than 300,000 premature deaths per year. Asthma, lung cancer and cardiovascular disease increase abnormally (Haidong Kan, 2009).
2 - Unequal economic growth:
The gap between rich and poor has widened and the number of people living below the poverty line has increased over the past two decades. More people may be marginalized in the global economy is constantly changing. The evolution is quite widespread, affecting three-quarters of OECD countries. The magnitude of change is small, but significant (7-8%) (OECD,2008).
A - The income gap:
On average in the OECD, in 2005 the incomes of the richest 10% are on average nearly nine times the income of the poorest 10%.
Income inequalities have widened significantly in the early 2000s, Germany, Canada, the United States and Norway. For cons, the gap has tended to narrow in Greece, Mexico, Turkey an
