Signs of the Times - May 2017 - 17
Taking Clean Air to New Heights
Toyota recently deployed an eco-billboard campaign to promote the environmentallyfriendly Mirai, a mid-size sedan that emits only water vapor and is one of the
first cars equipped with a hydrogen fuel cell to be sold commercially.
According to press materials, the environmentally conscious billboard's titaniumdioxide coating improves air purity; it was developed by PURETi Group
(New York City).
Conducted in cooperation with Clear Channel Outdoor Americas, Toyota's
campaign will clean the air until May 28 using 37 billboards in the Los Angeles
and San Francisco areas, with Toyota claiming that the eco-billboards will reverse
"the equivalent of 5,285 vehicles' worth of nitrogen dioxide emissions per month."
How does it work? Nitrogen dioxide is converted into harmless nitrate in the presence of oxygen from the atmosphere;
the process is catalyzed by titanium dioxide from the billboard. Vehicle emissions, per the Environmental Protection
Agency, are among the primary contributors of nitrogen dioxide to the atmosphere.
In our April 2017 Tech Review column (p. 24), ST unintentionally displayed the incorrect
photograph of A&C Plastics Inc.'s Block Acrylic sheeting. The correct image is shown here.
We regret the error.
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