This image was tweeted by US astronaut Scott Kelly, commander of the International Space Station, from his post in space on January 12. Kelly referred to the news television channel CNN which was “just talking about this pollution in #India sitting up against the #Himalayas”. Kelly tweets pictures of Earth from space all day.
.@cnni and @CNNweather were just talking about this pollution in #India sitting up against the #Himalayas pic.twitter.com/D1yIknfyYT
— Scott Kelly (@StationCDRKelly) January 12, 2016
India is on the left half of the image, under the grey pall of pollution. The Himalayas and Nepal are on the right. The image is of a section of central UP. According to a database of PM 2.5 pollution produced by the WHO in 2014, 13 of the world’s 20 most polluted cities are in India. Delhi, Patna, Gwalior and Raipur are the top four in the list.
Scott Kelly, along with Russian cosmonaut Mikhail Korniyenko, has been in space since March 27, 2015, on a one-year mission to understand how the human body reacts to long-duration spaceflight. According to NASA, the science will be used to determine ways to reduce risks on future deep space missions such as a flight to Mars.