Concrete, pavement making Tucson hotter - and experts say it's
getting worse  Urban concrete effect may surpass even global
warming, study finds 2012-11-18T00:00:00Z 2013-01-05T13:51:57Z
Concrete, pavement making Tucson hotter - and experts say it's
getting worseTony Davis Arizona Daily Star Arizona Daily Star
November 18, 2012 12:00 am  •   No, it's not your imagination.
It's getting hotter every year - and scientists predict the
urban heat island effect, in which more buildings and pavement
cause temperatures to rise, will only get worse.  From 1969 to
this year, as Pima County grew from about 300,000 to nearly a
million people, the average nighttime low temperature at a
north-side Tucson monitoring station rose 3.5 degrees,
University of Arizona researchers say.  Over the next 40 years,
the trend is likely to worsen or at least stay about the same,
depending on how fast the regional "Sun Corridor" grows and lays
down pavement between Prescott and Southern Arizona, a new
Arizona State University study proje