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Bob Yoesle was awarded a Dark Sky Defender award in 2015 by DarkSky International for his efforts to conserve the night sky of the Goldendale Observatory. Photo courtesy Bob Yoesle

Excessive artificial light at night — “light pollution” — is a growing environmental and public health concern. The wasted energy from poorly directed and unnecessary outdoor lighting adds the equivalent of 21 million tons of CO2 to the atmosphere annually. With the proliferation of outdoor LED lighting, night sky brightness is growing rapidly. The splendor of the night sky, cherished for milennia, is being dramatically lost, even in rural America.

In response, Sisters, Oregon — a picturesque town of 3,475 residents surrounded by forests and the Cascade Mountains — has achieved certification as an International Dark Sky Community, joining a prestigious list of more than 200 International Dark Sky Places worldwide. Though the town lacks a public observatory, it has shown a commitment to night sky conservation by providing public education outreach initiatives, including formation of astronomy clubs years ago. The city recently updated its outdoor lighting ordinance to ensure it met the standards set by DarkSky International.