The purpose of this study is to understand which health effects that occur from exposure of asbestos and material containing quartz and if interactions with smoking leads to increased risk of lung cancer. The construction workers on site often lack knowledge about the risk of cancer when exposed to asbestos or quartz. The issue that I am going to discourse is, which health effects occur when exposed to asbestos or quartz? Does the risk of lung cancer increase when exposed to smoking, asbestos and quartz? Which measures can be used to prevent and reduce exposure of asbestos and quartz and how does the work handling asbestos looks today?  The work is based on a literature review and an interview as a complement. Results of the study have been shown that smoking is associated with asbestos- or silica exposure and doubles the risk of lung cancer. To reduce and prevent exposure of asbestos, quartz and decrease the risk of lung cancer the measures that can be used are; encouragement of quitting smoking, use of the respirators and training for handling asbestos and quartz. The conclusions are that smoking is associated with asbestos- or silica exposure that increases the risk of lung cancer and that younger employees do not have similar knowledge as older of the consequences of exposure and management.