Oregonians across the political spectrum want their state government to set an example of environmental responsibility and offer incentives to encourage businesses to be more ecologically conscious, according to poll results released yesterday by Portland State University. Sixty-three percent of 500 voters surveyed said they support requiring state agencies to make eco-friendly business decisions, which could include buying recycled paper and fuel-efficient cars. Sixty-two percent support tax credits for farmers who reduce their use of pesticides and fertilizers, and 58 percent support tax incentives for businesses that cut energy and water use as well as toxic emissions. The poll was taken in February, one month after Oregon Gov. John Kitzhaber (D) announced his intent to issue an executive order that would require state agencies to work toward sustainability.