Introduction: Lungs are the major organ involved in a number of infectious. inflammatory and occupational disease. secondarily involved in almost all form of terminal disease. So many people around the world suffer from preventable lung disease. https://uifnhvpettbbh5.wikicorrespondence.com/4843800/nonlinear_hierarchical_effects_of_housing_prices_and_built_environment_based_on_multiscale_life_circle_a_case_study_of_chengdu