Researchers studying the environmental consequences of acid rain have reached an important milestone, adding evidence for a theory that has been the focus of much scientific debate. Publishing in the December, 2003 issue of the Soil Science Society of America Journal, a team at the University of Maine reported that a modest addition of acid in a paired watershed experiment resulted in a decrease of crucial nutrients in forest soils.
For more than 30 years, scientists in Europe and North America have recognized that acid rain could spur the loss of nutrients that are important for growing trees. Nutrients moving out of the soil into lakes and streams could also affect water quality. Nevertheless, observations that such losses have occurred have often been dismissed as extreme cases or as a result of natural changes in forested landscapes.
At the Bear Brook Watershed in Hancock County, Maine, a research team led by University of Maine scientists has now documented that under carefully controlled conditions, treating a watershed with additional acids accelerates the loss of two critical nutrients, calcium and magnesium.
Ivan Fernandez | EurekAlert!
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At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).
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