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The Commission's 1997 report, Ecological Regions of North America, provides a framework that may be used by government agencies, non-governmental organizations, and academic researchers as a basis for risk analysis, resource management, and environmental study of the continent's ecosystems. [1] In the United States, the EPA and the United ...
U.S. Census Bureau regions and divisions. Since 1950, the United States Census Bureau defines four statistical regions, with nine divisions. [1] [2] The Census Bureau region definition is "widely used... for data collection and analysis", [3] and is the most commonly used classification system.
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The Environmental Protection Agency (EPA) is an independent agency of the United States government tasked with environmental protection matters. [2] President Richard Nixon proposed the establishment of EPA on July 9, 1970; it began operation on December 2, 1970, after Nixon signed an executive order. [3]
The commission's 1997 report, Ecological Regions of North America, provides a framework that may be used by government agencies, non-governmental organizations, and academic researchers as a basis for risk analysis, resource management, and environmental study of the continent's ecosystems. [1]
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EPA, the Supreme Court found that both the EPA and states have some authority in state permitting decisions, and under certain circumstances, the EPA may countermand state permitting decisions. In an 1824 Supreme Court case Gibbons v. Ogden (22 U.S. 1), control over navigable waterways was held to be included within the commerce clause.
Average temperatures in almost all regions in the U.S. have increased in the last 120 years. [6] Annual temperatures averaged across the U.S. have exceeded the 1971–2000 average almost every year in the 21st century. [7] Climate change has led to the United States warming by 2.6 °F (1.4 °C) since 1970. [8]