Pingie: HTTP:: Fighting Pollution with Spaced Trees

HTTP:: Fighting Pollution with Spaced Trees
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A new study has recently revealed that it may be more constructive to plant trees in the middle of the street using a more widely spaced layout plan than cramming many in the same place. According to the paper, while those plants with some distance between them are very efficient at soaking up carbon dioxide, those that are close to each other have the potential to trap dangerous gases in the “canyons” that are formed when they are planted. Cities in Europe, where trees are planted both in the middle of the road and on the sidewalk in high densities, are cited as negative examples in the paper. A team of researchers from Switzerland and Germany conducted this study along routes known as “urban canyons,” streets that are surrounded by very tall and closely packed buildings on both sides. The most important analyzed factor was the influence that the trees themselves had on ventilation and pollution levels in their surrounding areas. Additionally, the experts compleme!
nted their research by constructing wind tunnel models of such urban canyons, and analyzing how the air flew within them. Swiss expert Christof Gromke, at the WSL Institute for Snow and Avalanche Research SLF, in Davos, and German scientist Bodo Ruck, from the University of Karlsruhe Institute for Hydromechanics, also looked ...
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http://news.softpedia.com/news/Fighting-Pollution-With-Spaced-Out-Trees-117138.shtml

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