Maricopa County is the fastest growing county in the country. The Guardian says it has become too hot to live there because a one part per ten thousand increase in atmospheric CO2 over the past century.
Maricopa County Leads the Nation in Growth – Connect CRE
Phoenix set their all-time record of 18 consecutive days above 110F in 1974, my freshman year at ASU. That was the peak year of the ice age scare.
30 Jun 1974, Page 31 – Arizona Republic at Newspapers.com
TIME Magazine Archive Article — Another Ice Age? — Jun. 24, 1974