Today I woke up and realized that for 3 years in Beijing I haven't seen blue skies very often. It's not like it has never happened before, but Beijing taught me to appreciate blue sky and clean air. As now it's National Holiday in China conveniently air is crystal clear. And two weeks before that there was some kind of big summit with African countries and the sky was clear again... so it made me think that somehow it's not just luck, it's something more. But this video is not about me looking for secret "huge air purifiers" on the top of Beijing hills. This is about the result of their work!