I strongly suspect that obesity and inactivity is the issue.
Yes, there are carcinogens in food, but they are typically way below natural hazard levels and things the consumer does. BBQ over charcoal for example. Smoke is bad for you. Even if it's eaten rather than inhaled.
The other thing that comes to mind is HPV--I do not think it's causing the cancer spike, but it was basically a chance discovery that hasn't been possible for all that long. Rather, we know of one virus whose only symptom is cancer--and cancer in basically anything it gets into. Unique things aren't common, if there's one there's probably more.
Yes, there are carcinogens in food, but they are typically way below natural hazard levels and things the consumer does. BBQ over charcoal for example. Smoke is bad for you. Even if it's eaten rather than inhaled.
The other thing that comes to mind is HPV--I do not think it's causing the cancer spike, but it was basically a chance discovery that hasn't been possible for all that long. Rather, we know of one virus whose only symptom is cancer--and cancer in basically anything it gets into. Unique things aren't common, if there's one there's probably more.