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Los Angeles Tests Reflective 'Cool Pavement' On Streets (dailynews.com)
mikeebbbd writes: As reported in the Los Angeles Daily News, during the current heatwave various officials swooped down on streets coated with an experimental light-gray sealer that makes the old asphalt into a "cool street" -- and it works, with average temperature differences between coated streets and adjacent old asphalt around 10F. At a large parking lot, the temperature reduction was over 20F. If the material holds up and continues to meet other criteria, LA plans to use it on more pavement rehab projects, which could eventually make a difference in the heat island effect. The "CoolSeal" coating is apparently proprietary to a company named GuardTop LLC, costs $25-40K/mile, and lasts 5-7 years. At that price, it's might not be used a lot, at least at first; typical slurry seals run $15-30K/mile.
Might be cheaper to plant trees and landscaping in an urban environment. Several tech companies are using rooftop gardens to put the heat to better use.
https://www.wired.com/2015/03/facebook-moves-new-garden-roofed-fantasyland/
Absorbing visible light and emitting infrared is what black surfaces do and that's the problem. Try thinking before saying stupid things.
No, like a political comment in a physics discussion.