Planting trees in some parts of the world could cause droughts, according to a Chinese-led study that suggested greening efforts should take regional conditions into account to be effective. Through a complex multi-decade study of vegetation and soil moisture patterns combining several databases and models, the researchers found that nearly half of the world had experienced a pattern of “greening-drying.”
This included parts of the United States, Central Asia, Central Africa, inland Europe, southern Australia and South America, where increasing vegetation cover resulted in a drop in soil moisture levels. But in other parts of the world – including the central parts of North America, northeast Asia, the Indian subcontinent and parts of the Sahara –
. Other places, including China, saw a mixture of both patterns.