Yes, but hasn't there been also a big increase in certain cancers such as colorectal in young people, and researchers don't have good guesses at what could be c

Yes, but hasn't there been also a big increase in certain cancers such as colorectal in young people, and researchers don't have good guesses at what could be causing them? The studies that I read ruled out screenings because it is happening in people decades younger than the first screening recommendations.