I think "feedback loop." Climate change, drought, more fires then spewing more carbon dioxide into air speeding up global warming a bit. There's a lot of stored carbon in Russia's forests, now some of it going up in smoke. I don't think the sky is falling, but there are these kind of feedback loops that can effect predicted time tables for global warming. Scary.
The news says that some of that haze I am seeing on my bike trip through Spokane area is all the way from Russia, rather than just our own Washington State forest fire season. Lots of haze and orange sunsets.
So far this year, Washington State fire season has been mild, due in part to late season rains.