a good ppt on human impact on environment.

1. Human Impact on tHeHuman Impact on tHe
envIronmentenvIronment

2.  IndustrializationIndustrialization
– Burning fossil fuelsBurning fossil fuels
– Non-renewableNon-renewable
resourcesresources
– PollutionPollution
– Increased COIncreased CO22 levelslevels
Population growth leads toPopulation growth leads to

3.  Burning of fossil fuelsBurning of fossil fuels
releases sulphates andreleases sulphates and
nitrates into airnitrates into air
 Sulphates and nitratesSulphates and nitrates
mix with water vapor inmix with water vapor in
air and form sulphuricair and form sulphuric
acid and nitric acidacid and nitric acid
Acid RainAcid Rain

4.  Lakes and ponds canLakes and ponds can
become so acidifiedbecome so acidified
that no life can live inthat no life can live in
them!them!
Acidification of lakesAcidification of lakes

5.  Population growthPopulation growth
leads to the loss ofleads to the loss of
natural habitatsnatural habitats
 Cut down trees to buildCut down trees to build
new homesnew homes
 Loss of biodiversityLoss of biodiversity
 Loss of oxygenLoss of oxygen
producers and COproducers and CO22
eliminatorseliminators
DeforestationDeforestation

6.  We spray pesticidesWe spray pesticides
and herbicides with outand herbicides with out
knowing theknowing the
consequencesconsequences
 DDTDDT
Herbicides and PesticidesHerbicides and Pesticides

7.  Claimed to be aClaimed to be a
miraclemiracle
 No effect on humansNo effect on humans
 Can build up in theCan build up in the
environmentenvironment
– Biological magnificationBiological magnification
DDTDDT

8.  Accumulated to suchAccumulated to such
levels in top predatorslevels in top predators
that it started havingthat it started having
lethal effects.lethal effects.
 Endangered manyEndangered many
species of birds,species of birds,
Including our BaldIncluding our Bald
Eagles.Eagles.
BioaccumulationBioaccumulation

9.  In the ’80’s it becameIn the ’80’s it became
apparent that theapparent that the
ozone layer wasozone layer was
disappearingdisappearing
 It was confirmed that isIt was confirmed that is
was directly caused bywas directly caused by
human activityhuman activity
Ozone depletionOzone depletion

10.  Carbon-Flouro-Carbon-Flouro-
Carbons in aerosolsCarbons in aerosols
were leaking into thewere leaking into the
atmosphere and eatingatmosphere and eating
away the ozoneaway the ozone
 Freon is also a CFCFreon is also a CFC
CFC’sCFC’s

11.  Water PollutionWater Pollution
– Oil SpillsOil Spills
– Gasoline spillsGasoline spills
– Gets into drinking waterGets into drinking water
PollutionPollution

12. Exxon ValdezExxon Valdez

13.  Increase in CO2Increase in CO2
 Increase inIncrease in
greenhouse effectgreenhouse effect
 Increase in globalIncrease in global
temperaturestemperatures
Global WarmingGlobal Warming

15.  GoogleGoogle
 WikipediaWikipedia
 Wallpaper.netWallpaper.net
BibliographyBibliography