Hazards magazine’s Choked campaign materials set out the case for the occupational exposure limit for respirable crystalline silica (RCS) to be at least halved from 0.1 mg/m3 to 0.05mg/m3, with a phased reduction to 0.025mg/m³. Countries including Austria, Denmark and France have already introduced a 0.05mg/m3 limit. Hazards says halving the limit would reduce dramatically the incidence of the lung scarring occupational disease silicosis, lung cancer, auto-immune diseases and other silica-related conditions and save 4,000 lives a year.