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Big city lights to go out for Earth Hour tonight

If you see a big bridge or stadium suddenly go dark tonight, don't be alarmed.

Seattle and Tacoma are joining thousands of cities around the world and turning out the lights for Earth Hour, from 7:30 to 8:30 p.m.

Landmark buildings will go dark for the hour, and residents are encouraged to take part by turning out all non-essential lights to support the ongoing fight against climate change.

City Hall, Key Arena, Pacific Science Center and Hammering Man are among the facilities turning out the lights in Seattle. The Tacoma Dome, Convention Center, Murray Morgan Bridge and Cheney Stadium are taking part as well.

Earth Hour began in Sydney, Australia in 2007 and has been gaining momentum even since.

This year, 157 countries are taking part in the annual lights-out event.

Bellamy Pailthorp covers the environment beat for KNKX, where she has worked since 1999. From 2000-2012, she covered the business and labor beat. Bellamy has a deep interest in Indigenous affairs and the Salish Sea. She has a masters in journalism from Columbia University.