Crushed rocks are spread on fields to absorb carbon dioxide from the airSO-Photography/AlamyUsing crushed rock dust to speed up the rate at which soils absorb carbon dioxide could also affect the climate by making Earths surface reflect more or less of the suns radiation.Enhanced rock weathering (ERW), as it is known, is rapidly growing around the world as scientists and businesses hunt for ways to capture carbon from the atmosphere.It involves sprinkling crushed volcanic rock, such as basalt, onto soils