Rider wrote on May 28
th, 2019 at 9:15pm:
Bobby. wrote on May 28
th, 2019 at 7:18pm:
Thanks Don - Australia is wrecking it's environment with
short term gains for the farmers.
They don't care if the land is wrecked forever.
What a complete load of bovine excrement. Is there a topic on this planet you know less on?
Go give yourself an uppercut for being so completely stupid.
Apologise and get an education from Bobby:
https://en.wikipedia.org/wiki/DesertificationDesertification
From Wikipedia, the free encyclopedia
Not to be confused with Decertification or Desertion.
Global desertification vulnerability map
Lake Chad in a 2001 satellite image, with the actual lake in blue. The lake has shrunk by 94% since the 1960s.[1]
Desertification is a type of land degradation in which a relatively dry area of land becomes a desert, typically losing its bodies of water as well as vegetation and wildlife.[2] It is caused by a variety of factors, such as through climate change (particularly the current global warming)[3] and through
the overexploitation of soil through human activity.[4] When deserts appear automatically over the natural course of a planet's life cycle, then it can be called a natural phenomenon; however, when deserts emerge due to the rampant and unchecked depletion of nutrients in soil that are essential for it to remain arable, then a virtual
"soil death" can be spoken of,[5] which traces its cause back to
human overexploitation. Desertification is a significant global ecological and environmental problem with far reaching consequences on socio-economic and political conditions.[6]
Causes
Preventing man-made overgrazing
Goats inside of a pen in Norte Chico, Chile. Overgrazing of drylands by poorly managed traditional herding is one of the primary causes of desertification.
Wildebeest in Masai Mara during the Great Migration. Overgrazing is not caused by nomadic grazers in huge populations of travel herds,[33][34] nor by holistic planned grazing.[35]
The immediate cause is the loss of most vegetation. This is driven by a number of factors, alone or in combination, such as drought, climatic shifts, tillage for agriculture, overgrazing and
deforestation for fuel or construction materials. Vegetation plays a major role in determining the biological composition of the soil. Studies have shown that, in many environments, the rate of erosion and runoff decreases exponentially with increased vegetation cover.[36] Unprotected, dry soil surfaces blow away with the wind or are washed away by flash floods, leaving infertile lower soil layers that bake in the sun and become an unproductive hardpan.
Many scientists think that one of the most common causes is overgrazing, too much consumption of vegetation by cattle. Controversially, Allan Savory has claimed that the controlled movement of herds of livestock, mimicking herds of grazing wildlife, can reverse desertification.[37][38][39][40][41]