(Washington, DC) -- Oregon is getting a D-plus for renewable energy. D.C.-based advocacy group Food and Water Watch issued a report yesterday on how states count polluting energy sources as renewable. The state gets a C for mandating that utilities get half of their energy from renewable sources by 2040, a strict standard. The grade is dragged down by what the study's authors say are dirty energy sources that actually leave a carbon footprint. The report says Oregon has a broad definition of renewable, which includes energy made from mill residue, wood waste and sewage gas.