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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 lowlands surrounding the Loutre River as it approached the Missouri River plain were farmed with hemp and tobacco, primarily with the use of slave labor. An African-American settlement was founded around 1800 commonly called Little Africa on one of the county's highest points at almost 1,000 feet of elevation overlooking the Loutre River ...
"Conservation" originated in the late 19th century as a movement built around the conservation of natural resources and an attempt to stave off air, water, and land pollution. By the 1970s environmentalism evolved into a much more sophisticated control regime, one that employed the Environmental Protection Agency to slow environmental degradation.
— Ireland's Environmental Protection Agency established. — The metaphor Ecological footprint is coined by William Rees. 1993 — The Great Flood of 1993 was one of the most destructive floods in United States history involving the Missouri and Mississippi River valleys. 1994 — United Nations Convention to Combat Desertification.
The Springfield Plateau is the only Ozark Highland Level IV ecoregion within all four states. [1] The nearly level to rolling Springfield Plateau is underlain by cherty limestone of the Mississippian Boone Formation and Burlington Limestone; it is less rugged and wooded than Ecoregions 38, 39b, and 39c, and lacks the Ordovician dolomite and limestone of Ecoregions 39c and 39d.
The Missouri River is a river in the Central and Mountain West regions of the United States.The nation's longest, [13] it rises in the eastern Centennial Mountains of the Bitterroot Range of the Rocky Mountains of southwestern Montana, then flows east and south for 2,341 miles (3,767 km) [6] before entering the Mississippi River north of St. Louis, Missouri.
The second proposal called for the construction of eighteen dams on Missouri's tributaries. Eleven of those dams had been previously approved by Congress. Five dams were planned to be located on tributaries of the Republican River in the lower basin. Of the remaining dams, the Pick plan recommended construction of one on the Bighorn River in ...
When not listing river lengths, however, alternative definitions may be used. The Missouri River's source is named by some USGS and other federal and state agency sources, following Lewis and Clark's naming convention, as the confluence of the Madison and Jefferson rivers, rather than the source of its longest tributary (the Jefferson). [3]