general information human interaction with the trf biome
Post on 26-Dec-2015
212 Views
Preview:
TRANSCRIPT
General Information Human Interaction with theTRF Biome
Deforestation increases C02 in the atmosphere
Wood is 50% carbon 1859-1990 deforestation released
122billion tonnes of carbon into atmosphere
Led to global warming Without GW temp would be -18 degrees
Lungs of the earth Trees clean the air by absorbing harmful
dust and particles, sulphur dioxide and nitrogen
Less trees means air quality declines Higher C02 lead to many changes
Extreme weather patterns, floods in australia last year, extreme heat now, mudslides in Brazil, droughts in sahel etc
Biodiversity Rainforest – 50% of worlds biodiversity
in 7% of landmass 137 species disappear every day Losing cures to cancer and aids 1 in four prescription drugs are derived
from plants by pharmaceutical ind.
Indigenous People Displacement Unique knowledge of Rainforest and
plants is being lost 53,000 square miles of rainforest lost in
1980’s
Soil Erosion Slash and Burn is used to clear forest –
releases nutrients into soil Increase productivity for short period Being leached by heavy rain In 3 years soil can be infertile Requires artificial fertiliser but too
expensive so more land is cleared Regeneration of forest is slow and soil is
eroded
top related