English Online: Sports Scene, Intermediate 2 by Debbie Lahav

By Debbie Lahav

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By Debbie Lahav

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2). 4 million hectares of lands in the Green River Formation contain oil shale deposits. 14 energy development and the human footprint In addition to oil and gas, coal resources are abundant and mined throughout western North America (fig. 3). 2 exajoules of energy annually (EIA 2008). The United States has the largest coal reserves in the world, and current production is second only to that of China. 6 exajoules produced annually. Canadian coal reserves represent greater energy potential than oil, gas, and oil sands combined; coal is currently the most important fossil fuel energy source in the country (International Energy Agency 2008).

Although such studies provide compelling evidence, the relationships between long-term or broad-scale human activities and wildlife impacts are not always linear in time or space. 36 biological response to energy development Vors et al. (2007) reported that the extirpation of caribou across Ontario was most strongly related to forest harvesting, when compared with other human activities, but only after a two-decade lag and within a tolerance threshold of 13 kilometers to the nearest clearcut. In contrast, mule deer (Odocoileus hemionus) in Wyoming avoided gas well pads within the year of construction (Sawyer et al.

Solar Generation of power from solar photovoltaic and solar thermal technologies more than doubled in the United States between 2000 and 2007. S. Department of Energy 2008b). Solar resources adequate for utility-scale projects are concentrated in the southwestern United States (fig. 4). The region currently has an installed capacity of 982 megawatts, 87 percent of it located in California. 6 million hectares (Western Governors’ Association 2009; fig. 4). Utility-scale projects consist of large solar arrays, and many of these projects are proposed in previously undeveloped landscapes.

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