Transcript Conservation is now ,the earth doesn*t wait

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• Loss of biodiversity: The loss of biodiversity is the
diminishing of different species within an ecosystem. The
rate of extinction has increased dramatically in recent years due to
our impact as humans. It is estimated that if current environmental
practices are not changed, we may lose 50% of all species globally.
• Problems : There is also the loss of the genetic diversity within
species, as well as the loss of diversity of different types of
ecosystems ,which can contribute to or speed up whole species
extinction. It produces environmental changes and the reduction
of the natural resources.
• Main Causes : Invasive Species, Habitat loss, Pollution Climate
Change , overexploitation of resources .
• Solutions:
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Establish more protected areas free of humans.
Preventing Species Introductions .
Slowing Climate Change .
Stop deforestation.
Reduce environmental pollution.
• Deforestation :It is the permanent destruction of indigenous forests and
woodlands, three million hectares disappear every year. Indigenous
forests now only cover 21% of the earth's land surface.
• Problems : Alteration of local and global climates through disruption of :
the carbon cycle and the water cycle /Soil erosion , because of the loss of a
protective cover of vegetation. /Silting of water courses./Extinction of
species which depend on the forest for survival. /Desertification .
• Main Causes : conversion of forests and woodlands to agricultural
land./development of cash crops and cattle ranching./ commercial
logging./felling of trees for firewood and building material.
• Almost all of this deforestation occurs in the moist forests and open
woodlands of the tropics. At this rate all moist tropical forest could be lost
by the year 2050,
- Desertification
is a type of land degradation in which a relatively dry
land region becomes increasingly arid, typically losing its bodies of
water as well as vegetation and wildlife. Desertification now affects
30% of the Earth’s land surface and all continents.
Causes:
• The immediate cause is the removal of vegetation. Unprotected, dry
soil surfaces then 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.
• Consequencies:
-Soil becomes less usable
-Vegetation is Lacked or Damaged
-Causes Famine
-Food Loss The soil is not suited for growing food
-People near Affected Areas
Desertification can cause flooding, poor water quality,
dust storms, and pollution.
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Solutions
To solve the problems caused by desertification means increase the amount of
food that can be grown in areas where people live and farm the land. The
following problems can be tackled by
1. Deforestation - Aforestation, that is re-planting trees, especially in shelter
belts. Planting grasses can help stabilise the soil and cut down on erosion by
wind and rain.
2. Overcultivation - Using good farming practices such as proper crop rotation
and the use of manure as a fertiliser
3. Overgrazing - It is important that the young trees are fenced off to prevent
grazing by animals
4. Poor irrigation - Make sure the water is not evaporated on the surface which
wastes water and increases its salinity
5. Drought - This can be triggered by deforestation, so aforestation should help
reduce this. Also terracing the land to slow down the water running off will make
better use of the rain that does fall