Love hills to escape pollution? Study finds smoke from plains is now reaching the Himalayas

Air pollution across eastern India and the Indo-Gangetic Plain has worsened sharply over two decades. Bihar and West Bengal are now highly polluted regions. Pollution is spreading from the plains into the Himalayas. India's clean air efforts focus on cities but neglect rural biomass burning, a major pollution source. This is a growing regional crisis.

Raccontata daeconomictimes.indiatimes.com