Even if not one drop of gas were burned in all of the entire globe, it would not change the pollution in Moscow today. This is all being caused by wildfires -- wood burning. And as much of a fan of being able to breathe as I am, this IS a natural event and a natural cycle. When the dead wood and brush reaches a saturation point, something starts a fire and it all burns. Then the ash helps the surviving plants and seeds to grow better.