What do you think it is about Belgium (a small country but by no means homogenous) that makes it more carcinogous than Italy? In the 40 years that I've lived here I've only know one or two cases of young people getting cancer.
Some stats do seem to confirm your anecdote: Belgium gets 345.8 cases / 100K (6th highest in the world) and Italy 290.6 / 100K (24th highest).