Read here. Okay, okay....the title should read 50% of east Europe's warming is due to cleaner air, and for the record, up to 20% of western Europe's warming is due to the same. Literally, the EU's own clean air regulations and controls have caused major warming, without the help of CO2. And, the result will be less warming in the future since there is less pollution to clean from the skies.
"Over Europe, the marked solar radiation increase since the 1980s is thought to have contributed to the observed large continental warming.....Statistically linking local visibility changes with temperature variations, we estimate that the reduction in low-visibility conditions could have contributed on average to about 10–20% of Europe’s recent daytime warming and to about 50% of eastern European warming. Large improvements in air quality and visibility already achieved in Europe over the past decades may mean that future reductions in the frequency of low-visibility events will be limited, possibly leading to less rapid regional warming.”"
The other major conclusion from this study is that climate models are worthless - a topic we've visited often.
"Unfortunately, current regional climate models are probably not ready to reproduce the physics underlying these trends.....As yet, state-of-the-art regional aerosol models have been shown not to be able to simulate with sufficient skill the total aerosol burden over Europe. Simulating trends in low-visibility phenomena, and their impact on climate, therefore remains an open challenge for models."