Environmental catastrophe

A environmental Catastrophe is the result of an event reaching with the integrity of whole or part of one or more ecosystems. This is why it is also named ecological catastrophe .

Certain catastrophes are of human origin: for example, the oil slicks, destruction of habitat S involving a loss of Biodiversity with the disappearance of thousands of species of plants and animals.

The environmental catastrophes can be presented in the form of sudden events, precisely dated, even if the effects are serious and are sensitive lasting of the years or the decades (for example an oil slick). Ecological catastrophes can be a consequence of a process proceeding over decades or more but whose consequences are important (example the hole in the Couche of ozone, this layer being very important for the protection of ultraviolet radiation for the living conditions).

Catastrophes related to human activities

Targeted and specific events

Process of nature catastrophic

  • in the Thirties, Dust Bowl in consequence of erosion due to the Intensive agriculture in large plains over one long period in the United States

  • brown Cloud of Asia
  • the Fifties in Japan intoxication with cadmium and mercury (intoxication of bay of Minamata)
  • massive reduction in the biodiversity and increase in the rate of extinction of the species
  • hole in the Layer of ozone, noted as of the Seventies
  • massive deforestation in various areas of the world,
  • gradual degradation of Pacific Islands due to the intensive extraction of Phosphate, especially Banaba and Nauru.
  • progressive draining of the Sea of Aral

Catastrophes due to natural causes

See also: Catastrophe#Catastrophes natural

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