India, Nov. 26 -- An American woman shared that she left Delhi, despite liking the city, because the poor air quality was affecting her twin babies. She posted on Instagram that the pollution prompted her to move back to the US, but later she discovered Bengaluru and now lives there.

"I lived in Delhi for three years and this was my life with twin babies. It felt like an abusive relationship. Wonderful sometimes, potentially deadly at others. I loved the city and it was fine 70% of the time but the other 30% during the winters, it was toxic and dangerous," wrote Dana Marie.

She then discussed other parts of the country where the air quality is not as poor as in Delhi. She added, "...we moved back to India but this time Bangalore."

"Not...