A couple poses during a pre-wedding photo shoot near India's Presidential Palace which is shrouded in smog, in New Delhi, India, November 5, 2021. REUTERS/Anushree Fadnavis TPX IMAGES OF THE DAY 

An Indian paramilitary soldier walks near India Gate which is shrouded in smog, in New Delhi, India, November 5, 2021. REUTERS/Anushree Fadnavis 

Decorative lights are seen in the balconies of a high-rise during Diwali, the Hindu festival of lights, as the coronavirus disease (COVID-19) pandemic continues, in Noida, November 4, 2021. REUTERS/Anushree Fadnavis 

Decorative lights are seen in the balconies of a high-rise during Diwali, the Hindu festival of lights, as the coronavirus disease (COVID-19) pandemic continues, in Noida, November 4, 2021. REUTERS/Anushree Fadnavis 

A couple feeds seagulls as they stand on the banks of Yamuna river, on a smoggy morning in New Delhi, India November 4, 2021. REUTERS/Adnan Abidi 

People ride a boat across Yamuna river on a smoggy morning in New Delhi, India, November 4, 2021. REUTERS/Adnan Abidi 

Traffic moves on a flyover on a smoggy morning in New Delhi, India, November 4, 2021. REUTERS/Adnan Abidi TPX IMAGES OF THE DAY 

A man bathes in the Yamuna river on a smoggy morning in New Delhi, India, November 4, 2021. REUTERS/Adnan Abidi 

A couple gets their picture clicked as they stand in a boat in the Yamuna river on a smoggy morning in New Delhi, India, November 4, 2021. REUTERS/Adnan Abidi 

People ride a boat across Yamuna river on a smoggy morning in New Delhi, India, November 4, 2021. REUTERS/Adnan Abidi