Xinhua: A newly released study by a Canadian scholar shows that rainfall and groundwater are crucial for crops in West Africa, yet agriculture may make droughts worse and lead to crop failure. Marc Parlange, a co-author of the study and a hydrology specialist and professor of civil engineering at the University of British Columbia in Vancouver, Canada, discovered that a Burkina Faso savannah received more rainfall than nearby land cleared for agriculture, posing serious questions about the sustainability...