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6 days ago · slide 1 of 1. The Toxic Substances Control Act (TSCA) Chemical Substance Inventory contains all existing chemical substances manufactured, processed, or imported in the United States that do not qualify for an exemption or exclusion under TSCA. This may be your starting place for interaction with EPA on TSCA regulatory matters.
2 days ago · The following list includes links to disambiguation and set index articles for topographic summits of the United States with identical names. The United States Board on Geographic Names is the official authority for all United States geographic names.
1 day ago · Affiliated areas are marked on the lists below. National Park System units are found in all 50 states, the District of Columbia, and the U.S. territories of Guam, American Samoa, the U.S. Virgin Islands, and Puerto Rico. The territory of the Northern Mariana Islands has an affiliated area but not an official NPS unit.
2 days ago · References. External links. List of the busiest airports in the United States. Hartsfield–Jackson Atlanta International Airport in the Atlanta metropolitan area, the world's and nation's busiest airport as of 2022. These are lists of the busiest airports in the United States, based on various ranking criteria.
5 days ago · The Editors of Encyclopaedia Britannica This article was most recently revised and updated by Brian Duignan. U.S. state, first-order administrative unit of the United States, one of 50 constituent political entities (four of them called commonwealths) that share sovereignty with the federal government. Each state has a written constitution of ...
1 day ago · The Constitution of the United States is the supreme law of the United States. [3] It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution delineates the national frame and constrains the powers of the federal government.
2 days ago · In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the region. [1] [2] Such regions are not legally incorporated as a city or town would be and are not legal administrative divisions like counties or separate entities such ...
