Veuillez noter qu’au fur et à mesure que de nouveaux pays ratifient le Protocole de Montréal, les chiffres de la production déclarée totale augmentent. De ce fait, la production ne correspond pas au [..]
L’intensité de l’appauvrissement de l’ozone dans une période donnée dépend d’interactions complexes entre des facteurs chimiques et climatiques comme la température et le vent. Le niveau [..]
Similar to corals, the region of greatest mangrove diversity is in Southeast Asia, particularly around the Indonesian Archipelago (Burke et al., 2001). There are three distinct areas of seagrass [..]
It is difficult to determine the amount of renewable water produced internally from the total renewable water resources (external and internal). However the FAO gives a rather precise definition of [..]
Throughout the 20th century, global water use has increased in the agricultural, domestic and industrial sectors. Evaporation from reservoirs has increased at a slower rate. Projections indicate that [..]
Rising block tariffs aim to achieve several public policy goals. A low or zero tariff applied to the first block can enhance affordability. For example, Durban, South Africa, provides 25 litres of [..]
Although freshwater ecosystems such as rivers, lakes and wetlands occupy less than 2% of the earth’s total land surface, they provide a wide range of habitats for a significant proportion of the [..]
The dependency ratio is a good indicator of where tension and conflict over water-sharing and use can occur. The map clearly depicts such areas including central Asia, the Middle East (especially [..]
A majority of the population in sub-Saharan African lives in rural areas, where income and employment depend almost entirely on rain-fed agriculture. This population is today at high risk. Sub-Saharan [..]
The greyband represents in the difference between the amount of water extracted and that actually consumed. Water may be extracted, used, recycled (or returned to rivers or aquifers) and reused [..]
Water overuse is damaging the environment in many major basins. High overuse tends to occur in regions heavily dependent on irrigated agriculture, such as the Indo-Gangetic Plain in south Asia, the [..]
Although the absolute quantities of freshwater on earth have always remained approximately the same, the uneven distribution of water and human settlement continues to create growing problems [..]
