Replacing high-polluting 2-stroke engines is an obvious early win in the Metro Area’s battle against high-ozone days.

Kirsten Schatz
Kirsten Schatz, of Wheat Ridge, is the clean air advocate for Colorado Public Interest Research Group Foundation.
Kirsten Schatz, of Wheat Ridge, is the clean air advocate for Colorado Public Interest Research Group Foundation.
Replacing high-polluting 2-stroke engines is an obvious early win in the Metro Area’s battle against high-ozone days.