(Portland, OR)  --  The city of Portland and Multinomah County plan to spend 120-thousand dollars to study local options to improve air quality.  Officials say current law doesn't do enough to protect residents from industrial air pollutants, especially those emitted by smaller manufacturers.  OregonLive reports the city and county are considering creating a metropolitan air pollution authority, which would take power away from the state Department of Environmental Quality.  Five other area governments, including Washington and Clackamas Counties, are endorsing the study.