McClatchy: Washington state governor Chris Gregoire and her counterparts in Oregon and California are considering a plan they hope would help transform the Pacific north-west’s Interstate 5 from a freeway ruled by gasoline burners to a haven for eco-friendly cars and trucks. The three governors envision a series of alternative fuelling stations stretching from the Canadian border to Mexico, creating what has been dubbed a “green freeway”. As the plan stands, motorists eventually would be …