5.3 More information on Environmental consequences

Since zones died desert are subject to the processes more and more accelerated by desertification, the vegetation disappeared on hundreds of million hectares, of new grounds (fine cover) were taken by the wind. By the effect of the wind erosion more and more increased in the weather.
More than 100 million tons of these dusts take the path of Europe in the indisputable consequences both for the health and the environment generally.
Perpetually for a better living environment in development of indigenous knowledge.

Drought and desertification cause sometimes irreversible risks on biodiversity, on the soil and vegetation impoverishment. They involve a modification of floristic composition, a reduction in the covering of the produced biomass and capacities of growth and reproduction of vegetation.

The most alarming consequences with respect to biodiversity appear on:

  • The wildlife and domestic fauna, whose management conditions are bad;
  • Flora, where certain species are jeopardized;
  • Certain waterways, formerly permanent and which became intermittent and upsetting biotopes of many species;
  • Migratory birds which constitute a world heritage and which find in the Sahel of the increasingly precarious habitats in residual wetlands.
  • Degradation pertaining to an overexploitation of grounds until exhaustion, the overexploitation and the bad use of grounds in arid regions caused a change of climate at the global level which is accelerated by climate changes.
  • Degradation pertaining to the overgrazing destroying the vegetable cover which protects grounds against erosion


Figure-8– Combination effect of drought and overgrazing in the steppe zones

The soil impoverishment pertaining to the bad practices as regards irrigation involve an increase in salinity, and drain sometimes the waterways that feed the big lakes.

  • The deforestation destroys trees which protect the ground against hydrous and wind erosion. Wood is the domestic independent source of energy (lighting, cooking) in many rural areas.

Risks of grasshoppers invasions in the catastrophic consequences on environment and agricultural economics.

Where a risk can activate another one.