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The semi-arid grasslands in the Mexico-United States border region are relatively intact and provide one of the best opportunities in North America to preserve and nurture an extensive series of grassland ecosystems. The conference was organized to increase appreciation for the importance of the remaining semi-arid grasslands and to create a platform for expanding the integration of natural and social sciences among individuals and organizations. The conference was attended by ranchers, environmentalists, academics, and agency personnel from both nations. Main topics include grassland ecology and biodiversity, management and conservation, and sustainable borderland ranching. Endangered species management, especially...
The Tohono O’odham Nation spans 2.8 million acres of Sonoran Desert habitat, ranging from grasslands in higher-rainfall areas on the east to desert scrub that dominates the drier northern and western regions. For the last three centuries, cattle-raising has provided a source of cash, food for community feasts and ceremonies, social status and political clout. However, cattle running in common made grazing and genetic management difficult and resulted in lower prices for livestock sold off the reservation. In the 1930s, without consulting local producers, the Nation was fenced into nine grazing districts, fragmenting grazing territories and keeping users from customary use areas. The result: resentment toward government...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Arizona,
climate,
cultural,
economic,
erosion,
During the past three years, working with more than 150 organizations representing public and private stakeholders, EPRI has developed the Electricity Technology Roadmap. The Roadmap identifies several major strategic challenges that must be successfully addressed to ensure a sustainable future in which electricity continues to play an important role in economic growth. Articulation of these anticipated trends and challenges requires a detailed understanding of the role and importance of reliable electricity in different sectors of the economy. This report is intended to contribute to that understanding by analyzing key aspects of trends in the economic value of electricity reliability in the U.S. economy. We first...
There is no shortage of U.S. energy policy studies, analyses and recommendations. Each new U.S. administration' and many state govemments seek to develop their own energy policy approach, and yet over time, it seems as if little progress actually is made toward achieving stated energy policy objectives. As an example, consider the following conclusions from a key report. Throughout this decade, oil will remain the single most important commercial fuel, while such other primary and secondary energy sources as natural gas, coal, nuclear power, electricity, and energy from renewable sources must be relied upon increasingly.
Categories: Publication;
Types: Citation;
Tags: International,
U.S.,
economic,
energy,
interdependency,
This paper estimates the extra costs of drilling for oil and gas on federal land as compared to private land in the Wyoming Checkerboard. The Checkerboard is a center of U.S. oil and gas activity in which square-mile sections of property alternate between federal and private ownership as originally established by the Pacific Railway Acts of 1862 and 1864. This land ownership pattern is used as an experimental control that may be used to identify differences in drilling cost on federal and private land. Estimates presented suggest that average drilling costs per well are about $200,000 higher on federal property than on private property. This difference is attributed to more stringent enforcement of environmental...
This paper intends to present a contribution to the development of techniques of decision-making in international projects of exploration and production of petroleum. A case study of the Multi-Attribute Utility Theory (MAUT) was developed and applied to define priorities among ten offshore exploration investment opportunities around the world offered to a Brazilian petroleum multinational company, according to decision-makers’ preferences. The MAUT model proposed shows for the first time a combination of operational, political and technological risks, resulting in a quite complete formulation to describe quantitatively the decision-making process. It is important to emphasize that this paper presents an unpublished...
The economic limit of an oil and gas asset occurs when income from production is less than the direct cost of operation. Economic limits determine the threshold for profitable operations and are often considered from a conceptual perspective rather than as an object for empirical assessment. The purpose of this paper is to derive empirical estimates of the economic limit of offshore structures in the Outer Continental Shelf Gulf of Mexico. We classify 1962 decommissioned structures between 1986-2009 by structure type, primary production, water depth and year of removal, and compute end-of-life production, adjusted gross revenue, and water cut thresholds according to various levels of categorization. During the last...
Categories: Publication;
Types: Citation;
Tags: Decommissioning,
Economic,
Production,
Revenue,
limit,
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