OLYMPIA, Wash. (AP) – More folks from Pacific Northwest are looking at hydrogen fuel to see if it could be a viable replacement for diesel and gasoline. The potential converts include transit agencies from Everett to Eugene and Boeing’s drone subsidiary in the Columbia River Gorge. A week-long demonstration tour with a hydrogen fuel cell electric bus started at Kitsap Transit last week and is continuing down the Interstate 5 corridor with eight more stops. A hydrogen fuel cell uses a chemical reaction between the hydrogen fuel and oxygen from the air to produce electricity. However, it’s more expensive than battery and diesel bus technology.