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