In addition to controlling sources of exposure and monitoring levels to check they are well within accepted limits, we arrange for independent ethical research to be carried out on the respiratory health of our people. This takes the form of epidemiological studies to compare their respiratory condition with that of the general population. This work is performed independently and the results are published fully in peer-reviewed literature. The World Health Organisation has commended Luzenac on this practice of independent study and open publication in scientific literature, which, they point out, is all too rare in industry.