"High levels of carbon dioxide means you have lower air exchange rates, which means higher radon concentrations."
(High levels of carbon dioxide; means; you have lower air exchange rates) Context(High levels of carbon dioxide means,List([1, 36))):(you; have; lower air exchange rates, which means higher radon concentrations)
High levels of carbon dioxide means,List([1, 36))
High levels of carbon dioxide you
means have
you have lower air exchange rates
lower air exchange rates, which means higher radon concentrations