Environmental issues
Environmental issues
Global warming• What is global warming?-the increase in the average temperature of the
Earth's near-surface air and oceans since the mid-20th century and its projected continuation
How Global Warming Happens?
Fossil fuels (coal, oil, natural gas)
Carbon Dioxide (CO2)
Effects of Global WarmingIncreased Temperature
Habitat Damage and
Species Affected
Changes in Water Supply
Rising Sea Level
What’s the proof that global
warming is taking place?
Portage Glacier
1914 2004
Alaska
Photos: NOAA Photo Collection and Gary Braasch – WorldViewOfGlobalWarming.org
Colorado River
Arizona
June 2002 Dec 2003
Why is global warming happening?
Burning of Fossil Fuels
Pollution from coal, natural gas, and oil
When did global warming start?
Global Atmospheric Concentration of CO2
How is global warming measured?
CO2 Measurements Before 1958 - Antarctica
CO2 Atmospheric Measurements
CO2 Measurements Since 1958 – Mauna Loa, Hawaii
What is green house effect?
Green house effects
What is a green house?• A greenhouse is a structure with a glass or plastic
roof and frequently glass or plastic walls; it heats up because incoming solar radiation from the sun warms plants, soil, and other things inside the building faster than heat can escape the structure.
• Air warmed by the heat from hot interior surfaces is retained in the building by the roof and wall. These structures range in size from small sheds to very large buildings.
The Sun’s energy passes through the car’s windshield.
This energy (heat) is trapped inside the car and cannot pass back through the windshield, causing the inside of the car to warm up.
Example of the Greenhouse Effect
Others environmental issues
OverpopulationOzone depletion
Species extinction
Water pollutionConsumer capitalismIntensive farming
Reference
http://www.globalstewards.org/issues.htm
http://www.globalissues.org/article/171/loss-of-biodiversity-and-extinctions
http://en.wikipedia.org/wiki/Thermal_pollution
http://environment.about.com/cs/a.htmhttp://environment.about.com/
http://www.offshore-environment.com/articles.html
http://en.wikipedia.org/wiki/Greenhouse