Biocrusts widely found on the Great Wall of China can slow the erosion process, thus contributing to the preservation of the structure. Photo: Peter Dowley CC BY 2.0 DEED Attribution 2.0 Generic

Biocrusts protect The Great Wall of China from erosion

Typical of arid or semi-arid expanses, soil bio-crusts are an important and undervalued natural resource. An international study has highlighted their ability to counter erosion

Re Soil Foundation