SIMON FRASER / SCIENCE PHOTO LIBRARY SIMON FRASER / SCIENCE PHOTO LIBRARY
Industrial air pollution. Steelworks producing smog as cows graze nearby at Aviles, Spain. The steelworks covers 8.3 square kilometres, and dates from the 1950s. Its emissions include particles, hydrocarbons, carbon monoxide, ammonia and fluorides, as well as sulphur dioxide and nitrogen oxides which are components of acid rain.
Model release not required. Property release not required.