claim: “A leading Canadian authority on polar bears, Mitch Taylor, said: ‘We’re  seeing an increase in bears that’s really unprecedented, and in places  where we’re seeing a decrease in the population
evidence: For example, Ross McKitrick and Patrick J. Michaels conducted a statistical study of surface-temperature data regressed against socioeconomic indicators, and concluded that about half of the observed warming trend (for 1979–2002) could be accounted for by the residual UHI effects in the corrected temperature data set they studied—which had already been processed to remove the (modeled) UHI contribution.