Impact of human activities on environment
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Transcript of Impact of human activities on environment
Human Impact on tHe Human Impact on tHe envIronmentenvIronment
IndustrializationIndustrialization– Burning fossil fuelsBurning fossil fuels– Non-renewable Non-renewable
resourcesresources– PollutionPollution
– Increased COIncreased CO22 levels levels
Population growth leads toPopulation growth leads to
Burning of fossil fuels Burning of fossil fuels releases sulphates and releases sulphates and nitrates into airnitrates into air
Sulphates and nitrates Sulphates and nitrates mix with water vapor in mix with water vapor in air and form sulphuric air and form sulphuric acid and nitric acidacid and nitric acid
Acid RainAcid Rain
Lakes and ponds can Lakes and ponds can become so acidified become so acidified that no life can live in that no life can live in them!them!
Acidification of lakesAcidification of lakes
Population growth Population growth leads to the loss of leads to the loss of natural habitatsnatural habitats
Cut down trees to build Cut down trees to build new homesnew homes
Loss of biodiversityLoss of biodiversity Loss of oxygen Loss of oxygen
producers and COproducers and CO2 2
eliminatorseliminators
DeforestationDeforestation
We spray pesticides We spray pesticides and herbicides with out and herbicides with out knowing the knowing the consequencesconsequences
DDTDDT
Herbicides and PesticidesHerbicides and Pesticides
Claimed to be a Claimed to be a miraclemiracle
No effect on humansNo effect on humans Can build up in the Can build up in the
environmentenvironment– Biological magnificationBiological magnification
DDTDDT
Accumulated to such Accumulated to such levels in top predators levels in top predators that it started having that it started having lethal effects.lethal effects.
Endangered many Endangered many species of birds, species of birds, Including our Bald Including our Bald Eagles. Eagles.
BioaccumulationBioaccumulation
In the ’80’s it became In the ’80’s it became apparent that the apparent that the ozone layer was ozone layer was disappearingdisappearing
It was confirmed that is It was confirmed that is was directly caused by was directly caused by human activityhuman activity
Ozone depletionOzone depletion
Carbon-Flouro-Carbon-Flouro-Carbons in aerosols Carbons in aerosols were leaking into the were leaking into the atmosphere and eating atmosphere and eating away the ozoneaway the ozone
Freon is also a CFCFreon is also a CFC
CFC’sCFC’s
Water PollutionWater Pollution– Oil SpillsOil Spills– Gasoline spillsGasoline spills– Gets into drinking waterGets into drinking water
PollutionPollution
Exxon ValdezExxon Valdez
Increase in CO2Increase in CO2 Increase in Increase in
greenhouse effectgreenhouse effect Increase in global Increase in global
temperaturestemperatures
Global WarmingGlobal Warming
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Bibliography Bibliography