Whats causing the number of the worlds deserts to increase and expand?
Iwnit has provided a very good answer with much technical information. I will address the consequences in the dry lands and how it is affecting the USA as well. . Dry lands cover 41% of the planet’s land surface, and are growing. They are home to over two billion people, including the world’s most impoverished, in areas such as central Asia and northern Africa. . Sand from the Sahara Desert blows over the Mediterranean Sea. One of the biggest problems is that as land dries up, it becomes unsuitable for farming. This exacerbates poverty and creates environmental refugees. . It is estimated that hundreds of thousands of people will be in need of new homes and lifestyles over the next 30 years as the Earth dries up. . The effects are also felt far beyond the desert areas themselves. Dust storms from the Gobi Desert in Asia and the African Sahara are responsible for respiratory problems as far away as North America, says the report. . Co-author Professor Uriel Safriel, of Hebrew University
