The interaction between genes and the environment plays a role in many diseases of the respiratory system. The Environment / Genetics / Cancer includes researchers interested in the genetic foundations that explain the impact of certain pathologies and environmental factors that may affect the respiratory health of the Quebec population. This axis brings together molecular biologists, geneticists, researchers interested in respiratory diseases related to professional activities, and researchers who study bioaerosols in the environment and buildings (residence, workplace, hospital, farm). Lung cancer takes its place in this area because of the important role of the environment (smoking, pollution, workplace) in its etiology, familial transmission of certain susceptibility genes, as well as in the large number of mutations. involved in the processes leading to the development of cancerous tumors.