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7 Environmental Problems

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on 12 October 2013

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Transcript of 7 Environmental Problems

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli
7 Environmental Problems
that are WORSE than we THOUGHT

1. Mammal Extinction
25 % of the world mammal species are at risk of extinction.

Crucial areas:
Southeast Asia
Central Africa
Central and South America
2. The Ocean Dead Zones
3. Collapsing Fish Stock
Fisherman have been pulling such a huge quantity of fish from the oceans that we’re heading toward a global collapse of all species currently fished – possibly as soon as the year 2048.

4. Destruction of the Rain Forest
Rainforest is home to 50% of all plants and animals on earth.

It is the earth living lungs- it breathes in carbon dioxide and breathes out oxygen.

5. Polar Sea Ice Loss
Is melting of sea ice at an unprecedented rate and it’s not slowing any sign of slowing down.

Due to human activities, The amount of CO2, released into the atmosphere has been rising extensively during the last 150 years.

Effects:
Imbalance in the worlds food chain.
“ When a predator disappears, the prey will multiply, when prey dies out, the predator will see its ranks decrease as well”

Characterized by lack or completely zero oxygen.

Since 1960, the number of dead zones has doubled every 10 years
Cause:
Excess nitrogen from farm fertilizers
Emissions from vehicles and factories
Sewage

Effects:
Many marine species die off at low oxygen levels.
Destroy marine species habitat

Cause:
29% of species have been cause by:
Pollution
Over fishing
Destructive fishing practices

Effects:
Shortage in fish supply
Unemployment for fishermen
100% collapsing fish stock by mid-century.

Cause:
Conversion of forest to Agriculture lands
Logging
Slash-and-burn
Effect:
60% of accelerate global warming
The forest contains more than 50% of all plants and animals species in the world. Destroying the forest will destroy these species forever.
Soil erosion
Cause:
Global warming

Effects:
Loss of habitat for seals and polar bears
Climate change
Rising sea level
Flood
Beach erosion
Island nation will be drowned

6. CO2 Levels in the Atmosphere
Cause:
Greenhouse gas emissions caused by our modern way of life:
Vehicles
Power plants
Factories
Burning of fossil fuels

Effects:
Polar sea ice loss
Global warming
Climate change

Effects:
Deforestation
Pollution
Shortage of resources

7. Population Explosion
Overpopulation – is defined as the condition of having more people that can live on the earth in comfort, happiness and health and still leave the world a fit place for future generations.

All human needs clean air, adequate water, food, shelter .

Cause:
Loss of habitat

Hunting
Full transcript