Drylands across the globe, from Australia’s southeast to the deserts of northern China, are defying expectations of desertification by becoming greener due to increased CO2 levels. Scientists warn that while this unexpected vegetation growth is a result of more efficient photosynthesis, it may also deplete scarce water resources and negatively impact desert ecosystems. Despite increased greening, the negative effects of hotter, drier climates persist, with potential downsides for desert plants and animals. The surprising upside of CO2 fertilization on arid lands could help mitigate climate change, but it also poses challenges for managing water supplies and preserving unique arid ecosystems.
https://e360.yale.edu/features/greening-drylands-carbon-dioxide-climate-change