Water limitations to large-scale desert agroforestry projects for carbon sequestration

Vegetation and soils take up 20% of global anthropogenic greenhouse gas emission (1), and vegetation also plays an active role in regulating global water cycle (2). In PNAS, Branch and Wulfmeyer (3) conduct a detailed regional-scale simulation to show that agroforestry can significantly enhance rainfall in some desert regions and therefore could provide an effective biological engineering approach to sequestrate carbon (3). They also identify...