Many of the problems that are currently hurting the environment are acid rain, stratospheric ozone depletion and global warming.As early as 1661, investigators realized that the waste product being released from smoke stacks in England were releasing harmful emissions that had the ability to change the environment. The main problem that they were concerned with was that it had the ability to trave[...]DOWNLOAD REFERAT
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Britain's first Alkali inspector Robert Angus Smith, noticed that the acidic rain made metals corrode and textiles to fade faster. In the book he wrote, "Air and Rain: The Beginnings of Chemical Climatology," he explains the main principles that make up acid rain and the chemistry that makes it up. Scientists also 100 years later used the foundation of his research and went to Sweden to study different types of rain and noted that rain coming from the sea contained more salt and the rain coming from industrial areas contained more sulfuric acid. Connections were being made that ecosystems were being polluted with acidic rain coming from industrial areas.
Scientists were using data from other fields of research to help study their main areas a focus and research. Svante Oden is a soil scientists who drew research from two other scientists, Carl Gustav Rossby and Erik Erikson to help plot the wind direction of air masses and to understand who other environments not close by could be affected. They realized that acidic rain could be carried almost 2000 km across Europe and traveled through several nations. Scandinavia was receiving acid rain from Great Britain, East and West Germany.
They noticed that the acidic levels in lakes, streams, decreased forest growth, increased plant disease and accelerated damage to materials. Swedish scientists presented results from a study conducted to the UN Conference on the Human Environment. It was the first time acidic rain was ever brought up on international level. It tried to make people aware that pollution from one country could affect multiple surrounding nations. In 1972, Likens and Bormann reported that rain in the United States was extremely over acidic. It turned out to be 100 to 1,000 more acidic than normal. « mai multe referate din Geografie