What changes can be seen in Sahara desert ???
According to 7th class ncert
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Africa's Sahara Changed from Wet to Dry Every 20,000 Years. A new study suggests climate conditions in the Sahara Desert have changed from wet to dry about every 20,000 years. The evidence showed that at times, the Sahara changed to a very wet climate.
However, the desert has shown a greener image over the last 15 years. Increasing temperatures lead to a stronger evaporation over the sea; said condensations rain down onto dry land. Especially in summer, heavier rainfalls occur in the central Sahara.
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