Rather than asking patients directly, they could at least use their previous addresses to deduce many things, such as water supply source, air pollution, etc (w

Rather than asking patients directly, they could at least use their previous addresses to deduce many things, such as water supply source, air pollution, etc (while keeping it anonymized). The govt could even run studies on cancer deaths cross referenced with location data from their tax returns, and their parent's tax returns (to figure out where they lived as a child). I'm just saying I've never heard this common sense approach actually discussed. It just seems like we often ignore the concept of "an ounce of prevention is worth a pound of cure".