Let's find out whether the air quality in China become better or worse from this visualization based on AQI data from 2014 to 2016.


Summer (Aug. 2015)
Winter (Feb. 2016)

Air Quality in China is still as bad as before

China has always been one of the most polluted countries all time. Harsher actions need to be taken to tackle with this problem.

Winter is the most polluted time in China

We dug a little deeper and found that it is because of the DENSITY of pullution particles could get denser than other seasons, besides, most of areas need heat to stay warm plus winter is colder so that pollution would be HARDER TO SPREAD OUT, which is why pollution can be more possible to escalate into a negative circle.