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wilderness

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Title: PowerPoint Author: USER Last modified by: USER Created Date: 4/4/2006 1:29:36 PM Document presentation format: Company – PowerPoint PPT presentation

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Title: wilderness


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(No Transcript)
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wilderness
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wilderness
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Leopard
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a buffalo being hunted down by two lions
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Zebra
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Baboon
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Hippos
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Gorilla
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Deforestation
Vegetation, in particular trees, absorb carbon,
in the form of carbon dioxide throughout their
lives by the process of photosynthesis. This
carbon is stored in the carbohydrates. Less
carbon dioxide is absorbed form the atmosphere
when trees are burnt.
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Mass deforestation, as is occurring with our
tropical rain forests, is decreasing the amount
of plant life on the planet. Trees and plants are
vital to us because they convert carbon dioxide
into oxygen. Industry will continue to emit
carbon dioxide into the air and, with the
decrease of vegetation, more carbon dioxide will
remain in the atmosphere to cause problems like
the enhanced greenhouse effect. On a smaller
scale, the destruction of trees destroys habitats
and can lead to the expansion of deserts for the
nutrient-rich soil around the trees is held
together by the tree roots. Without these, the
soil is eroded away.
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  • PollutionThere are 3 types of pollution
  • Air
  • Water
  • Land
  • Air and water
  • Whenever we burn anything, we produce gases.
  • Coal, oil and gas contain sulphur which
  • becomes sulphur dioxide, carbon which becomes
    carbon
  • dioxide, and nitrogen which also oxidizes.
  • Sulphur dioxide and nitrogen oxides dissolve
    in
  • rainwater to become acid rain
  • Carbon dioxide could be causing an enhanced
  • Greenhouse Effect

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  • We are polluting the water with sewage,
    fertiliser
  • And toxic chemicals.As we use more land for
    farming therefore using more fertilisers, more of
    it
  • ends up in water.
  • Land
  • Land can be polluted in two main ways
  • With toxic chemicals, fertiliser and herbicides
  • With building and dumping waste
  • By using up non-renewable resources
  • Chemical pollution impacts the environment by
    poisoning plants and animals.

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Greenhouse Effect
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The earth's atmosphere contains heat-absorbing
gases (water vapor, carbon dioxide, methane,
ozone, and nitrous oxide) which are referred
to as "greenhouse gases. The earth's "greenhouse
effect" is what makes this planet suitable for
life as we know it.But too many green house
gases have caused a dangerous global warming
process that is threatening our current
environment by melting polar ice caps and raising
sea levels around the globe, flooding low-lying
areas, and a big change in the Earth's climate.

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Arrange the following living things in order to
form a food chain and explain their relationship.
The Sun, Plants, Herbivores and Carnivores.
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1. The sun is the original source of energy,
in the form of light, for the food chain. 2.
Plants capture about 1 of the available
light energy from the sun for carbohydrates
production by way of photosynthesis. 3.
Herbivores consume about 10 of the plant
produced in a typical food chain. 4.
Carnivores consume about 10 of the energy
stored by the herbivores.
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  • What happens when one organisms in the food chain
    carries disease?
  • 2. What happens when one organism in the food
    chain dies or disappears? For example, in the
    picture of the rabbits and wolf if the grass
    dries up and disappears, how will this affect the
    food chain?
  • 3. What happens when forests decrease?

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Thesis Nature is a finely balanced mechanism
and that it will not tolerate the abuse we have
been giving it
Aswan Dam
Hawaiian Goose
Mosquito Plague
Restate the thesis
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