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Costs and benefits of building energy efficiency are estimated as a means of reducing greenhouse gas emissions in Pittsburgh, PA and Austin, TX. The analysis includes electricity and natural gas consumption, covering 75% of building energy consumption in Pittsburgh and 85% in Austin. Two policy objectives were evaluated: maximize GHG reductions given initial budget constraints or maximize social savings given target GHG reductions. This approach evaluates the trade-offs between three primary and often conflicting program design parameters: initial capital constraints, social savings, and GHG reductions. Results suggest uncertainty in local stocks, demands, and efficiency significantly impacts anticipated outcomes....
Coal mining is one of the most important causes of environmental pollution, as large quantities of coal dust particles are emitted. Colombia-South America has large natural coal reserves and "El Cerrejón" is the world's largest open-cast mine located in the northern department of Guajira. The aim of the present study was to evaluate genotoxic effects in a population exposed to coal residues from the open-cast mine "El Cerrejón". 100 exposed workers and 100 non-exposed control individuals were included in this study. The exposed group was divided according to different mining area activities: (i). Transport of extracted coal, (ii). Equipment field maintenance, (iii). Coal stripping and, (iv). Coal embarking. Blood...
All mining lease boundaries found in the Powder River Basin. This data layer has many overlapping polygon features and is thus more applicable if used as Arc/Info regions. Each region is attributed relating to the name of the coal mine utilizing the leased area. The data layer was originally produced by the Bureau of Land Management and distributed in an ASCII text format which was then converted into a GIS layer.
Coal croplines found in the Powder River Basin, 1:24000 scale. Coal cropline is the exposed coal seam due to erosion and tectonics. Each linear feature is attributed with reference to the name of the coal seam that is exposed. The data were originally produced by digitizing photointerpreted coal cropline features off of 1:24,000 USGS quadrangles.

map background search result map search result map Mining lease boundaries for the Powder River Basin Wyoming Coal croplines in the Powder River Basin Wyoming at 1:24,000 Coal croplines in the Powder River Basin Wyoming at 1:24,000 Mining lease boundaries for the Powder River Basin Wyoming