Simple answer is because Seattle is so green with foliage and trees. .
Seattle, WA...
Seattle, Washington has the nickname of "The Emerald City."Specifically, the nickname reflects the city's lush green landscapes. Seattle is located in the northwestern coastal area of Washington state. It benefits from its marine location and frequent rain events.
Bellevue,Wa
Seattle, Washington
Seattle, Washington is a city in the USA which is on the continent of North America.
Seattle, WA
CHeeMa
Seattle,WA
It is roughly 2,000 miles from Oklahoma City, OK to Seattle, WA
Seattle is located on Puget Sound in the state of Washington.
Seattle WA
2,850 miles.