1. S it is assumed that air pollution increases residential radon concentrations in rural
2. the risk of Iung cancer in the total leading homes and more frequent domestic wood
3. to relative risks between 1.1 and 1.5. In a and coal burning in the countryside.
4. western population of 1 million about 300 Additionally studies on occupations involv
5. male and female Iung cancers are diagnosed ing exposure to diesel exhaust add further