1. BY: Ghali ,Amr ,Jomana ,Isu and, Nadeen

2. Graph Lithosphere Global warming Irrigation Collage
What causes Global warming
What causes Global warming

4. Lithosphere The lithosphere is the outermost shell of a rocky planet.
It consists of everything over the crust.

5. Global warming
Global warming is the increase in the average temperature of Earth's near-surface air and oceans since the mid-20th century and its projected continuation.
According to the 2007 Fourth Assessment Report by the Intergovernmental Panel on Climate Change, Most of the observed temperature increase since the middle of the 20th century has been caused by increasing concentrations of greenhouse gases, which result from human activity such as the burning of fossil fuel and deforestation.
Global dimming, a result of increasing concentrations of atmospheric aerosols that block sunlight from reaching the surface, has partially countered the effects of warming induced by greenhouse gases.
This causes the snow to melt in the poles so the water rises.

6. What Causes Global Warming?

7. Irrigation is an artificial application of water to the soil.
It is used to assist in the growing of agricultural crops, maintenance of landscapes, and revegetation of disturbed soils in dry areas and during periods of inadequate rainfall.
Additionally, irrigation also has a few other uses in crop production, which include protecting plants against frost, suppressing weed growing in grain fields and helping in preventing soil consolidation. Irrigation wastes water.

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10. Bibliography www.google.com www.heathersanimations.com
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