Yeah living in the area I have noticed that as well. Pollution coming from the east / northeast (Weld County) probably due to the fracking. But if not, it wo

Yeah living in the area I have noticed that as well. Pollution coming from the east / northeast (Weld County) probably due to the fracking. But if not, it would be interesting to find out where. However, this is not to say Den/Boulder doesnt still have pollution issues that need solving. I am hoping they will curtail diesel usage on the Front Range and we see better adoption of EVs here to help battle it. Y ou would be amazed at the amt of people with diesel trucks rolling coal and modding to emit plumes of smoke here :(