نتایج جستجو برای: lead pollution
تعداد نتایج: 404869 فیلتر نتایج به سال:
Urban meteorology and pollution are characterised by a number of atmospheric parameters and their evolution in time, which all have specific problems as to their monitoring, representativeness, parameterisation and modelling compared to rural situations. The main goal of the Action COST-715 (1998-2004) was to provide the best guidance on how meteorology may be included in pollution calculations...
[1] A high-resolution, 8000 year-long ice core record from the Mt. Logan summit plateau (5300 m asl) reveals the initiation of trans-Pacific lead (Pb) pollution by ca. 1730, and a >10-fold increase in Pb concentration (1981–1998 mean = 68.9 ng/l) above natural background (5.6 ng/l) attributed to rising anthropogenic Pb emissions from Asia. The largest rise in North Pacific Pb pollution from 197...
In an increasingly integrated world, falling trade barriers mean that the role environmental regulations play in shaping a country’s comparative advantage is greater than ever. This has lead to fears that “dirty” industries will relocate to developing regions where environmental regulations may be less stringent. A number of reasons have been offered to explain why, despite anecdotal evidence a...
We analyse the effects of transboundary pollution on trade patterns and welfare in a general equilibrium trade model. Production in a dirty industry generates pollution that negatively effects productivity, both at home and abroad, in a clean industry. Trade may lead to the spatial separation of production but the existence of transboundary pollution can offset the benefits from specialization....
In desert reclamation strainer plants can be used for improvement and decrease pollution of soil and water. This technology can be used to remove both inorganic and organic contaminants in soil. In this study, one year old Acacia victoriae seedlings were exposed to Pb (NO3)2 in 5 different concentrations; 0, 50, 250, 500 and 1000 mg Pb L-1 for 45 days in two growing seasons. Subsequently, the h...
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