Polltion blankets Delhi and Lahore

 Thanks to the BBC https://www.youtube.com/watch?v=unwjik-Tk2A&t=180s and tutor2u https://www.tutor2u.net/economics/blog/delhis-deadly-air-a-breathless-economy-suffocates-under-the-weight-of-negative-externalities?utm_medium=email&utm_campaign=Daily%20tutor2u%20Economics%20blog&utm_content=Daily%20tutor2u%20Economics%20blog+CID_b5c80afe0b74a0ef90a67799fa33c745&utm_source=CampMonitor&utm_term=Delhis%20Deadly%20Air%20A%20Breathless%20Economy%20Suffocates%20Under%20the%20Weight%20of%20Negative%20Externalities