I say:
There may be three main causes of the Global Warming:
1. The Earth has become nearer to the Sun.
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2. The Earth axis inclination may also be responsible, whatever the degree be small or big.
3. The Ozone layer change, it is a result and a cause of the Global Warming; because it is the first preventive layer of at least some of the sun rays. The change and holes in the ozone layer is a serious thing which may be the beginning of some changes that will take place in the atmosphere of the Earth, which is a sign of the approach of Doomsday.
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