National Geographic : 1981 Nov
Deadly waters: In an Adirondack stream, brook troutconfined in a wire cage succumb to asphyxiation-a result of the water being polluted by rain-and snow-borne sulfuric and nitric acids. Acid rain has eliminated fish in thousandsof lakes in Scandinaviaand hundredsin the U. S. and Canada. Scientists believe acid rain comes from the burning offossil fuels, but its environmentalpathways and effects are still a puzzle. By ANNE LABASTILLE Photographs by TED SPIEGEL BLACK STAR ACID RAIN How Great aMenace?