This.

Crossing the border to Nepal after spending ten days in India was a breath of fresh air -- literally. My cold and cough symptoms, which had been pervasive in the smog of Delhi, Agra, Jaipur and Varanasi, cleared up like magic. Mind you, I was there in November, which is probably worse than February. But still.

It's a good reminder to all of us: This is what's in our collective futures, if we don't clean up our act. Cities like Delhi, Beijing, etc. show us what we have to look forward to if we don't get serious about reducing emissions.