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Climate Change
Biology A2
Isabella Danks…read more

Slide 2

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Climate change is a change in the
world's climate.
· Global warming is an increase in the
average temperature of the earth's
atmosphere.…read more

Slide 3

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Greenhouse Effect
Energy from the Sun warms the
surface of the Earth. A small
percentage of this energy is
reflected back but at a longer
wavelength than the original
The outgoing wavelength is
prevented from escaping the
ENERGY atmosphere by carbon dioxide,
water vapour and other gases.
These things reflect it back
Humans have increased the greenhouse
towards the Earth's surface. This is
effect, not produced it. The excess carbon
the greenhouse effect, making the
dioxide, methane, nitrogen oxides and other
temperature inside the
gases have contributed to this. This means
atmosphere higher than that
that less long-wavelength energy can be
radiated into space, away from the Earth.…read more

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Industrial Revolution
· During the Industrial Revolution there was a
switch from using sustainable resources
(charcoal, wood) to using non-renewable
resources like coal and later oil. The burning of
fossil fuels and deforestation increased the
amount of carbon dioxide in the atmosphere
from 280ppm to 400ppm.…read more

Slide 5

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· Methane concentration has also risen due to the
increase in production of rice. Paddy fields (where
rice is cultivated) release methane due to the
bacteria living in the swampy, anaerobic
· More people means more food meaning more
cattle for meat. Cattle rely on gut bacteria to break
down cellulose and plant material. A waste product
of this is methane (cow digestion can produce up
to 40dm^3 of methane per day).…read more

Slide 6

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Rice cultivation requires land. To get land,
deforestation must occur. This would reduce
the diversity of the area because removing
trees lessens the food source, shelter and
breeding ground of many organisms.
· This can cause local extinction because the
loss of one organism may result in further
losses due to losses in the food chain.…read more

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