1

2

A Problem

• As globalizations increases our capacity to impact our environment we must face the serious consequences of our industrialized society.

• We wish to clarify, the fast approaching penalties of our everyday actions.

3

A Natural Occurrence?

• Natural greenhouse gases create a natural greenhouse effect that we cannot live without.

• If we did not have the greenhouse effect this world would be about 30 degrees Celsius colder.

• That means that without the greenhouse effect our world would be uninhabitable.

4

Responsible• Our climate is altered by natural causes and by human causes. – Some natural causes include solar activity, volcanic

emissions, changes in earths orbit and natural greenhouse gasses.

– Human causes mostly include burning fossil fuels and exerting harmful gasses into the atmosphere.

• Human activities have the biggest influence on the increase of greenhouse gasses. In the past 50 years this has been the clearest.

5

Interesting evidence of global warming

• This phenomena is an example of how little we know about the possible implications of global warming

• In far northern Canada the Native Inuit have noticed the sun rise significantly earlier in the year (2 months)

• This has been caused by the warming of the layer of air above the snow. This distorts the sun’s light, literally causing it to rise earlier.

6

Temperatures

• Between the years 1860-1900 average temperatures have increased by 0.75 degrees Celsius.

• Over the past 100 years global temperatures have risen by 1.3 degrees.

7

Weather in recent winters

• Recent winter was the warmest winter ever recorded( in the history of the planet Earth).

• 10 out of the past 14 years are the warmest on record.

8

Glacier and Ice Cap Melting• Evidence of global warming is very apparent in the recent melting of ice

sheets. • Two places where melting has become extremely visible are Antarctica and

Greenland.• One problem with this is that much less heat is absorbed by snow than by

water, thus worsening the effect as the ice retreats.

• left- predicted arctic melting

9

Melting Glaciers

• One area of particular concern is the Himalayans. 1/3 of the worlds fresh drinking water comes from the run off from this glacier system.

• A direct consequence from our polluting actions will be the disappearance of these vital glaciers.

What will happen to those couple billion who depend on this previously reliable water source?

10

Sea level rising• Possibly the biggest threat

brought by global warming is rapid sea level changes.

• Two years ago the entire Larsen B ice shelf broke away into pieces in less than a month. Scientists thought it would be at least a decade before this shelf melted, even with global warming.

• Both Greenland and Western Antarctica are depleting at shocking rates.

• Not all of global Warming's effects are unprecedented.

11

The Earth is melting!

Name : Arjit Saraswat

Class : IXth B

Roll no. : 23School : 35-Model