Most Russians believe that wildfires have swept across Siberia this summer because of illegal logging and the authorities’ negligence, according to a new poll published by the independent Levada Center pollster.

Activists and environmentalists have decried the authorities’ slow response to the fires, which at their peak covered an area the size of Belgium and have caused at least $100 million worth of damage. Their size has dwindled from 3 million hectares in July to almost 190,000 hectares this week.