Over 7,000 cases of cancer in Wales per year, could be prevented with lifestyle changes, according to a new study by Cancer Research UK.
This equates to around 140 cancer cases a week in Wales, which is 38% of all cancers diagnosed each year in Wales.
Figures show smoking remains the highest type of lifestyle cancer but also highlights that obesity can cause breast, bowel and kidney cancers, among others.
The third biggest preventable cause of cancer in Wales is exposure to certain substances at work, for example asbestos.
Workplace exposures cause around 760 cases of cancer a year (4% of all cancer cases). Many of these cases are linked to historical exposure from work in construction and manufacturing.