That equates to an area almost as large ... of land degradation by which fertile land loses much of its biological -- and economic -- productivity, and becomes desert. Today, up to 40% of the ...

Between 5,000 and 14,500 years ago, this desert region was a lush and fertile area known as the Green Sahara. That has led scientists to believe that ancient humans in this part of the world would ...

Using agricultural waste and algae, the company is creating a fertile mixture designed to boost plant growth for tree planting projects and food production, reviving desert and other non-arable land.