Breast and lung cancer rates have doubled around the world over the last 30 years, a report shows.

Cancer Research UK said much of the growth was due to more people living longer - as cancer is a disease which usually affects older people.

But they said habits such as smoking and diet also had a significant effect.

One example is bowel cancer which used to be extremely rare in Japan. But as the Japanese increasingly eat a westernised diet, rates of the cancer increase.

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