There's more than one reason Oregon is green. Sure, one is the amount of rainfall that we get here, but the other is the amount of Hybrids on our roads. Especially in Portland. Eleven out of every 1,000 households in Portland own a hybrid car - the highest in the country as of 12/06*. In fact, according to an article in Willamette Week from 2002, Portland drivers owned 500 of the first 20,000 Honda and Toyota hybrids sold in the US. And that was back when being "green" wasn't even cool. But Portland isn't the only city making Oregon green. Bend and Eugene also ranked in the top 15 cities buying the most hybrids.
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*According to a report on Hybridcars.com