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When natural habitats are destroyed or natural resources are depleted, the environment is degraded; direct environmental degradation, such as deforestation, which is readily visible; this can be caused by more indirect process, such as the build up of plastic pollution over time or the buildup of greenhouse gases that causes tipping points in ...
[27]: 2321 For example, the decline of sea ice in the Arctic has been accelerating during the early twenty‐first century, with a decline rate of 4.7% per decade (it has declined over 50% since the first satellite records). [28] [29] [30] One well known example of a species affected is the polar bear, whose habitat in the Arctic is threatened ...
Short-term economic gains made by conversion of forest to agriculture, or over-exploitation of wood products, typically leads to a loss of long-term income and long-term biological productivity. West Africa , Madagascar , Southeast Asia and many other regions have experienced lower revenue because of declining timber harvests.
Deforestation has several causes including colonization, agricultural expansion, firewood collection, timber harvesting and extension of cultivation on slopes. In the Indian Himalayas debris thrown down slopes due to the reckless use of excavator machines for widening roads and making of new roads has destroyed vast areas of Forest.
For example, in Ethiopia the country has been affected by chronic and ongoing land degradation processes and forms. The major proximate drivers are biophysical factors and unsustainable land management practices, while the underlying drivers are social, economic, and institutional factors.
The Society for Ecological Restoration defines restoration as "the process of assisting the recovery of an ecosystem that has been degraded, damaged, or destroyed." [1] Restoration ecology is the academic study of the science of restoration, whereas ecological restoration is the implementation by practitioners. [21]
An example of how this may happen is through by-catch.These new species will outcompete the native species and take over, therefore causing the local or global extinction of a species. [ 32 ] Due to the fittest animals in the species being hunted or poached, the less fit organisms will mate, causing less fitness in the generations to come.
Some members of the Sub-Commission have, however, proposed that the definition of genocide should be broadened to include cultural genocide or "ethnocide", and also "ecocide": adverse alterations, often irreparable, to the environment – for example through nuclear explosions, chemical weapons, serious pollution and acid rain, or destruction ...