Smoke billows from a chimney at a leather factory, with fog from air pollution over the Egypt's capital of Cairo, Egypt February 5, 2023. REUTERS/Amr Abdallah Dalsh Photo: AMR ABDALLAH DALSH/REUTERS
A view of old houses with hotels and the Great Pyramids during sunset with fog from air pollution over the Egypt's capital of Cairo, Egypt February 5, 2023. REUTERS/Amr Abdallah Dalsh TPX IMAGES OF THE DAY Photo: AMR ABDALLAH DALSH/REUTERS
A general view of the city during sunset, with fog from air pollution over the Egypt's capital of Cairo, Egypt February 5, 2023. REUTERS/Amr Abdallah Dalsh REFILE - CORRECTING YEAR Photo: AMR ABDALLAH DALSH/REUTERS
A bird flies next to the smog-covered Akshardham temple in New Delhi, India, November 4, 2022. On November 4 at 08:00 IST, Patparganj, the closest monitoring station, registered a PM 2.5 reading of 500, maxing out the scale. REUTERS/Adnan Abidi SEARCH "ABIDI POLLUTION INDIA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. Photo: ADNAN ABIDI/REUTERS
Residential buildings under construction are seen shrouded in heavy smog in Noida, on the outskirts of New Delhi, India, November 6, 2022. On November 6 at 10:00 IST, Sector 116 in Noida, , the closest monitoring station, registered a PM 2.5 reading of 398. REUTERS/Adnan Abidi SEARCH "ABIDI POLLUTION INDIA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. Photo: ADNAN ABIDI/REUTERS
A Hindu man walks amidst heavy smog after praying on the bank of the river Yamuna, in the old quarters of Delhi, India, November 4, 2022. On November 4 at 09:00 IST, Sector 125 in Noida, the closest monitoring station, registered a PM 2.5 reading of 356. REUTERS/Adnan Abidi SEARCH "ABIDI POLLUTION INDIA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. Photo: ADNAN ABIDI/REUTERS
A car drives past the India Gate amidst heavy smog in New Delhi, India, November 3, 2022. On November 3 at 11:00 IST, Major Dhyan Chand National Stadium, the closest monitoring station, registered a PM 2.5 reading of 453. REUTERS/Adnan Abidi SEARCH "ABIDI POLLUTION INDIA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. Photo: ADNAN ABIDI/REUTERS
Hindu devotees gather to worship the Sun God amidst heavy smog in the early morning during the Hindu religious festival of Chatth Puja, on the bank of the Yamuna river in New Delhi, India, October 31, 2022. REUTERS/Adnan Abidi SEARCH "ABIDI POLLUTION INDIA" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES. Photo: ADNAN ABIDI/REUTERS