World population evolution

Trois hypothèses pour l’évolution de la population mondiale : Selon le bureau de la population des Nations unies, la plus vraisemblable est l’hypothèse moyenne…

Trends in global water use by sector

The greyband represents in the difference between the amount of water extracted and that actually consumed. Water may be extracted, used, recycled (or returned…

Increased global water stress

According to Population Action International, based upon the UN Medium Population Projections of 1998, more than 2.8 billion people in 48 countries will face…

Trends in capture fisheries and aquaculture

The leveling off of the global fisheries catch reflects a growing decline in most major fishing areas. Today, these fishing areas are producing lower…

The water cycle

Environment water transport system. The water cycle consists of precipitation, vapour transport, evaporation, evapo-transpiration, infiltration, groundwater flow and runoff. Figure 1 explains the global…

Excessive withdrawal of renewable water resources

The countries known to be experiencing stress or scarcity of water per capita are roughly those which are excessively using their renewable water resources…

Tigris and Euphrates rivers fragmentation

It has been predicted that access to water will create conflict between countries. In Africa, central Asia, west Asia and the Americas, some countries…

Fish protein world consumption

Consumption of proteins from fish in % of total consumption of animal protein.

When the city harms its own water resources

In areas where surface water is not readily available (located far from areas of need), groundwater is the primary water source. Groundwater aquifers supply…

The decline of cod in the North Atlantic

Graph of the decline of fish stock globally and a map of fish stock in Maritime Canada and the United States.

Poor and rich: inequal demographic evolution

According to the medium hypothesis of the United Nations, a projection comparing the population in developed and undeveloped countries.

Coral reefs at risks

There are two distinct regions in which coral reefs are primarily distributed: the Wider Caribbean (Atlantic Ocean) and the Indo-Pacific (from East Africa and…