The industrial hemp amendment allows colleges, universities and state agriculture departments to grow hemp for research purposes.
Supporters of the two $1 billion-refineries say emissions would be "cleaner than those from factories that use petroleum or coal to make methanol."
Oregon utility regulators approved the expansion of compressed natural gas fueling around the state.
Oregon officials have postponed the decision to place a liquified natural gas terminal near the mouth of the Columbia River.
The state's gas prices are the 19th most expensive in the nation.