Tuesday, November 26, 2013

Where does China heavy air pollution come from?

A few days ago there was heavy pollution over most of China.
Hopefully it is much better now as it rained in Changsha.

Back in 2006, there was not so much pollution.
So I wonder how this is possible?

Of course many people have cars. This was not the case a few years ago.
But then again there are many cars in Paris. And the pollution index stays "low", for PM2,5 it is often around 60, while here in Changsha it reaches 400! (and I am talking about Chinese pollution index, so it certainly means 450).

There are also many constructions.
But you have construction all the year long. And there is a lot less pollution in summer!

During winter many people have heaters. It was not the case back in 2006! Heaters use electricity produced produced by burning coal!
Even though these days the weather is not so cold in Changsha. Most likely people didn't turn on their heaters!

Burning fields
I guess the pollution comes from burning field.
Farmers burn field at this time of the year. And they do this all over China.

Humidity and a lack of wind keeps the tiny particle stuck in the air.

Some field of garbage burning