You have to consider the context. When you have an expanding desert, planting a mono-culture of Gao trees to stop this expansion is not a bad thing. In this ca

You have to consider the context. When you have an expanding desert, planting a mono-culture of Gao trees to stop this expansion is not a bad thing. In this case the trees will establish a desert fence, bind moisture and improve the soil, which in turn will allow more species to gain a foothold.