green sahara note makeing

Sahara is the world’s largest desert. Yet beneath its surface could be found vast aquifers of fresh water. The basis of the huge ‘buried treasure’ of water was laid down in prehistoric times. The water found is clean and refreshing. 6000 years ago, Sahara was quite a different place. It was full of greenery and water. Prehistoric rock-art of Sahara indicates the presence of hippopotamuses which need water round the year. Migration of Paleo-monsoon to the Sahara region led to its wet and rainy climatic conditions. Later, around 5000 years ago, the monsoon shifted towards south, leaving Sahara in a state of drought. This led the inhabitants to migrate to the Nile Valley. The shift in the earth’s axis and decreased precipitation left the place dried out. Consequently, the soil lost its ability to hold water and vegetation decreased. For the past 4000 years Sahara has remained the same.