In 2017, pollution was responsible for 15% of all deaths globally, and 275 million Disability-Adjusted Life Years. India saw the most pollution deaths — about 2.3 million — a new report has found.

Toxic, disease-causing pollution travels the globe and crosses national borders in many guises, both visible and invisible. Air pollution from coal-fired power plants, vehicle emissions, and factories circle the earth, as does vaporized mercury and many other airborne pollutants.