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Global Warming

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by

Ali Singh

on 17 October 2013

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Transcript of Global Warming

References
http://www.climatehotmap.org/global-warming-effects/drought.html
http://library.thinkquest.org/07aug/00941/cause.htm
www.ucsusa.org
www.youtube.com
Global Warming
What causes Global Warming?
Scientists think that Global Warming is caused by the gases produced when humans burn coal, oil, etc. These gases trap the sun's heat in the atmosphere. Carbon dioxide is made when these fuels are burned.
Global warming is also caused by solar radiation in the form of light waves,that pass trough the earth's atmosphere. Most of this radiation is absorbed by the earth and warms it.
Hurricanes
Scientist say there is in creasing evidence that hurricanes are getting stronger due to global warming.
Warmer water in the oceans pumps means more energy into tropical storms
making them stronger and more destructive
Sea Levels Rising
Global Warming also causes sea level rising.
The water expands as it gets warmer
Sea level rises when chunks from ice shelves located in the two poles fall into the water
Summary
Therefore global warming is a big issue for everyone. It destroys our world, creates disasters, risks the lives of animals and humans (living things in general) and ruins our environment.
Why is global warming bad for humans?
It has effects like:
More powerful hurricanes.
Sea-level rise.
Reduced snow pack (water shortages)
More droughts.
More wildfires.
More heat waves.
Agricultural shifts.
Video
More Droughts
By Rigel
While some regions are likely to get wetter as the world warms, other regions that are already on the dry side are likely to get drier.
Southern Africa, the Sahel region of Africa, southern Asia, the Mediterranean, and the U.S. Southwest, for example, are getting drier.
Even areas that remain relatively wet can experience long, dry conditions between extreme precipitation(rain,snow,sleet or hail that falls to the ground) events
More wildfires
The number of large wildfires — defined as those covering more than 1,000 acres — is increasing throughout the region. Over the past 12 years, every state in the Western U.S. has experienced an increase in the average number of large wildfires per year compared to the annual average from 1980 to 2000 some of this is because of global warming
Agriculture
When the land gets dry there will be no more crops
no grass to feed the animals
soil erosion (the washing away of soil by the flow of water.)
More heat waves
While each heat wave has ties to short-term weather variability, increasingly common and intense heat waves are one of the most well-understood consequences of man made global warming, since as global average surface temperatures increase, the probability of extreme heat events increases by a greater amount. Data already suggests that heat waves have are becoming more common worldwide because of global warming
water shortages
Full transcript