Obesity is now the leading preventable risk factor for cancer

The 2014 World Cancer Report, last released six years ago, also showed that cancer has overtaken heart disease as the leading cause of death in Australia and almost every other country, killing an estimated eight million people globally each year, including more than 43,000 Australians. 

This number is expected to rise to 20 million globally by 2025.

The majority of cancer-related deaths in Western countries are due to lifestyle factors such as weight, alcohol intake and physical inactivity, said Terry Slevin, a spokesman for the