4 ms·

Why doesn’t India have the same kinds of deep red as China? The only thing I can come up with is their infrastructure is lacking, less roads and highways?

dharmab 6y ago
The map only shows NO2, not all pollutants.
- jfoster 6y ago
  How concerning should NO2 be? I was surprised to see that on this map Tokyo seems worse off than Bangkok. On AQI measures it's typically the other way around.
  - enriquto 6y ago
    NO2 by itself is not too much concerning (it is toxic, but it appears in very low concentrations in the open). It just happens to be very easy to detect using hyperspectral images, and it is also a proxy for the existence of other pollutants.
  - DoingIsLearning 6y ago
    The evidence so far is that on top of the expected lung disease in children and adults (due to lung tissue irritation) it more critically seems to reduce human lifespan. [0] The challenge is to fully separate if this effect is due to NO2 exposure or a combination of other pollutants found in diesel fuel exhaust. The key takeaway is that Diesel engines release a very high amount of NO2 and that NO2 is in all likelihood killing us slowly. We need to decomission diesel engines from roads, and more urgently, remove diesel engines from city centres ASAP (Due to traffic jams, iddling diesel engines create very high concentrations of NO2 in the vicinity of pedestrians and cyclists). [0] Nitrogen dioxide: health effects of exposure, Guidance from the Committee on the Medical Effects of Air Pollutants (COMEAP), 2015 https://www.gov.uk/government/publications/nitrogen-dioxide-health-effects-of-exposure https://www.gov.uk/government/publications/nitrogen-dioxide-...
hungryhobo 6y ago
I'm guessing cause India is still in lockdown while china has resumed it's economy
- mekster 6y ago
  Check before covid.
azurezyq 6y ago
Economy is still not on par. As of 2018, China has 5x in GDP vs India. Population is comparable.

dharmab 6y ago

The map only shows NO2, not all pollutants.

jfoster 6y ago
How concerning should NO2 be? I was surprised to see that on this map Tokyo seems worse off than Bangkok. On AQI measures it's typically the other way around.
- enriquto 6y ago
  NO2 by itself is not too much concerning (it is toxic, but it appears in very low concentrations in the open). It just happens to be very easy to detect using hyperspectral images, and it is also a proxy for the existence of other pollutants.
- DoingIsLearning 6y ago
  The evidence so far is that on top of the expected lung disease in children and adults (due to lung tissue irritation) it more critically seems to reduce human lifespan. [0] The challenge is to fully separate if this effect is due to NO2 exposure or a combination of other pollutants found in diesel fuel exhaust. The key takeaway is that Diesel engines release a very high amount of NO2 and that NO2 is in all likelihood killing us slowly. We need to decomission diesel engines from roads, and more urgently, remove diesel engines from city centres ASAP (Due to traffic jams, iddling diesel engines create very high concentrations of NO2 in the vicinity of pedestrians and cyclists). [0] Nitrogen dioxide: health effects of exposure, Guidance from the Committee on the Medical Effects of Air Pollutants (COMEAP), 2015 https://www.gov.uk/government/publications/nitrogen-dioxide-health-effects-of-exposure https://www.gov.uk/government/publications/nitrogen-dioxide-...

hungryhobo 6y ago

I'm guessing cause India is still in lockdown while china has resumed it's economy

mekster 6y ago
Check before covid.

azurezyq 6y ago

Economy is still not on par. As of 2018, China has 5x in GDP vs India. Population is comparable.