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I am strongly in favor of strengthening California air quality
standards with the the proposed regulation. We've done great
things already to limit car-produced pollution; let's not allow
construction vehicles to undermine those valuable reductions. 

Construction vehicles are emit large quantities of the most
dangerous air pollutants in the state: 20% of the particulate
matter and 16% of smog-forming NOx compounds. With childhood
asthma cases at near-epidemic rates, we need to act to reduce
these pollutants for our children's, and our own, health. 

I live in the San Francisco Bay Area, and am horrified by the bad
air quality in the area whenever our usually helpful winds change
and don't immediately take our pollutants out of the area. I am
also a regular bicyclist and have experienced firsthand the foul,
choking black fumes emitted by diesel construction vehicles. 

With the high rates of new building and road work in this area,
construction vehicles are clearly a major source of dangerous smog
and their emissions should be strongly regulated.

Thank you, 
Eliza Jewett