Smoke in Moscow 4 August 2010
Moscow is in a heavy smog caused by burning nearby area peat. It burns because of anomalous hot weather this summer. Feeling at home like you're sitting just before a fire and it's hard to breath. In some districts concentration of carbon monoxide (CO) 3 times above norm now and in downtown 4,5 times!
Russia today from 29 July 2010 Situation was much better that time