There was an article I read recently — perhaps right here on HN — that pointed out cancer rates are lower at high altitudes. (The author suggested that it had t

There was an article I read recently — perhaps right here on HN — that pointed out cancer rates are lower at high altitudes. (The author suggested that it had to do with contaminants flowing down hill). The point is (assuming neither study contains an artefact): there is a trade off.