One of those hopeful graphs, cos that is how it works around the world - if you're clawing for a job, the condition of the air isn't your first concern. But once you get enough scratch to start considering other things, pollution becomes something you worry about, since it is hurting your quality of life. Once you have a middle class, they are going to demand change.
Apparently New Delhi pollution rates were off the charts last week
If you use windy.com, you can Show / Add more layers and
select PM2.5 to show air pollution. PM2.5 refers to smaller particulate matter in the air (smoke is little particles, I assume) that is more dangerous to health.