Silent? It says: "The map, based on 18 months’ worth of satellite data, shows very high levels of NO2 above major European and North American cities and across much of north-east China."
It says the ship track detection is "surprising". The level of pollution in China is NOT surprising. It's a mess. It's all the factories and coal-burning power plants. I've been to Guangzhou in the winter (the orange spot in southern China). First day there, in a hotel on the Pearl River, we couldn't see a big bridge about 3/4 of a mile away. We got lucky with a cold front that cleared the air out the next day and could see it. But it's usually choking with smog.
>> The article is silent on this, but...
> Silent?
Edit error. I intended to restate that before
posting, and blew it.
However, the article might as well be silent on it,
because the NO2 footprint over China is so glaring.
It could be as intense there as in the rest of the
world combined.