. . . . . . . . . . . . . . "A killing rain"@en . "Acid rain was one aspect of environmental pollution discussed at a public hearing in London, 1982. Examines the background to this major pollution problem of the 1980's."@en . "Acid rain - a poisonous blend of sulphur dioxide gas, dilute sulphuric and nitric acids - is mainly produced by burning coal and oil. Horizon reports on how it became the major international pollution problem of the 1980s."@en . "Documentary films"@en . "An in-depth look at the effects of acid rain in the Northern Hemisphere,. including poisoning of lakes, trees and drinking water, presumed causes and the."@en . . . . . . . "A Killing rain"@en . . . . "United Nations Environment Programme." . .