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Environment Of Tennessee
Located in the Southeast United States, Tennessee is a state as diverse as its landscapes. Politically, Tennessee is broken up into three Grand Divisions: East Tennessee, East, Middle Tennessee, Middle, and West Tennessee. Physically, Tennessee is also separated into three main types of landforms: river valley plain, highlands and basins, and mountains. Nature centers The environment of Tennessee includes the nature centers of Discovery Center at Murfree Spring, Lichterman Nature Center and Owl's Hill Nature Center. In addition to these nature centers, there are many more options throughout the state like those in the capital of Nashville. These include Beaman Park Nature Center, Bells Bend Outdoor Center, Shelby Bottoms Nature Center, and Warner Park Natural Center. Flora * Astragalus bibullatus * Eriogonum longifolium var. harperi * Isoetes lacustris * Rock gnome lichen * Sarracenia oreophila * Utricularia inflata * Utricularia radiata Trees *Abies fraseri *Ulmus serotina ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southeast United States
The Southeastern United States, also known as the American Southeast or simply the Southeast, is a geographical region of the United States located in the eastern portion of the Southern United States and the southern portion of the Eastern United States. The region includes a core of states that reaches north to Maryland and West Virginia, bordering the Ohio River and Mason–Dixon line, and stretches west to Arkansas and Louisiana. There is no official U.S. government definition for the region, and it is defined variably among agencies and organizations. History The history of the present-day Southeastern United States dates to the dawn of civilization in approximately 11,000 BC or 13,000 BC. The earliest artifacts from the region were from the Clovis culture. Prior to the arrival of European colonialists, Native Americans occupied the region for several hundred years during the Woodland period. The first Europeans to arrive in the region were conquistadors associated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Utricularia Inflata
''Utricularia inflata'', commonly known as the swollen bladderwort, inflated bladderwort, or large floating bladderwort, is a large suspended aquatic carnivorous plant that belongs to the genus ''Utricularia''. It is a perennial that is native to the southeastern coastal plains of the United States. It has often been confused with '' U. radiata'', which is similar but smaller than ''U. inflata''. Since 1980, ''U. inflata'' has been reported to exist in locations beyond its traditional range, such as the Adirondack Mountains in New York, southeastern Massachusetts, and in Washington State. Studies on the populations in the Adirondacks suggest that an introduction of ''U inflata.'' to a location where it naturalizes can lead to altered sediment chemistry by reducing the net primary productivity of native species. It is also listed by the state of Washington as a problematic species because of the dense mat-forming habit of this aquatic ''Utricularia''. It is one of the few carnivor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geology Of Tennessee
The geology of Tennessee is as diverse as its landscapes. Politically, Tennessee is broken up into three Grand Divisions: East, Middle, and West Tennessee. Physically, Tennessee is also separated into three main types of landforms: river valley plain, highlands and basins, and mountains. Paleozoic Most of the sedimentary rock across Middle Tennessee was deposited from the Ordovician to the Mississippian, roughly between 400 and 300 million years ago. The sediment was primarily deep ocean limestones with some shale layers. Mississippian limestones are generally thicker and more cherty than those of the Ordovician, and additionally. In the Ordovician, the Appalachian Mountains began to form and by the end of the Paleozoic were tall peaks. During the Pennsylvanian, the Cumberland Plateau formed along the edge of the Appalachians as beach and shore sediments, primarily sandstone today. Mesozoic Most Mesozoic sediments were deposited in West Tennessee, along the present course of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Biofuels
Biofuel is a fuel that is produced over a short time span from biomass, rather than by the very slow natural processes involved in the formation of fossil fuels such as oil. Biofuel can be produced from plants or from agricultural, domestic or industrial bio waste. Biofuels are mostly used for transportation, but can also be used for heating and electricity. Biofuels (and bio energy in general) are regarded as a renewable energy source. The use of biofuel has been subject to criticism regarding the " food vs fuel" debate, varied assessments of their sustainability, and ongoing deforestation and biodiversity loss as a result of biofuel production. In general, biofuels emit fewer greenhouse gas emissions when burned in an engine and are generally considered carbon-neutral fuels as the carbon emitted has been captured from the atmosphere by the crops used in production. However, life-cycle assessments of biofuels have shown large emissions associated with the potential land ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Executive Order (United States)
In the United States, an executive order is a directive by the president of the United States that manages operations of the federal government. The legal or constitutional basis for executive orders has multiple sources. Article Two of the United States Constitution gives presidents broad executive and enforcement authority to use their discretion to determine how to enforce the law or to otherwise manage the resources and staff of the federal government's executive branch. The delegation of discretionary power to make such orders is required to be supported by either an expressed or implied congressional law, or the constitution itself.John Contrubis, '' Executive Orders and Proclamations'', CRS Report for Congress #95-722A, March 9, 1999, Pp. 1-2 The vast majority of executive orders are proposed by federal agencies before being issued by the president. Like both legislative statutes and the regulations promulgated by government agencies, executive orders are subjec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Measures Of Pollutant Concentration
Measures of pollutant concentration are used to determine risk assessment in public health. Industry is continually synthesizing new chemicals, the regulation of which requires evaluation of the potential danger for human health and the environment. Risk assessment is nowadays considered essential for making these decisions on a scientifically sound basis. Measures or defined limits include: * ''no-observed-adverse-effect level'' (NOAEL), also called ''no-effect concentration'' (NEC), ''no-observed-effect concentration'' (NOEC) or similarly * ''lowest-observed-adverse-effect level'' (LOAEL) * ''acceptable operator exposure level'' (AOEL) * ECx (in percentage). No-effect concentration ''No-effect concentration'' (NEC) is a risk assessment parameter that represents the concentration of a pollutant that will not harm the species involved, with respect to the effect that is studied. It is often the starting point for environmental policy. There is not much debate on the existence ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Effects Of Global Warming
Effects of climate change are well documented and growing for Earth's natural environment and human societies. Changes to the climate system include an overall warming trend, changes to precipitation patterns, and more extreme weather. As the climate changes it impacts the natural environment with effects such as more intense forest fires, thawing permafrost, and desertification. These changes impact ecosystems and societies, and can become irreversible once tipping points are crossed. Climate activists are engaged in a range of activities around the world that seek to ameliorate these issues or prevent them from happening. The effects of climate change vary in timing and location. Up until now the Arctic has warmed faster than most other regions due to climate change feedbacks. Surface air temperatures over land have also increased at about twice the rate they do over the ocean, causing intense heat waves. These temperatures would stabilize if greenhouse gas emissions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Nations Framework Convention On Climate Change
The United Nations Framework Convention on Climate Change (UNFCCC) is the UN process for negotiating an agreement to limit dangerous climate change. It is an international treaty among countries to combat "dangerous human interference with the climate system". The main way to do this is limiting the increase in greenhouse gases in the atmosphere. It was signed in 1992 by 154 states at the United Nations Conference on Environment and Development (UNCED), informally known as the Earth Summit, held in Rio de Janeiro. The treaty entered into force on 21 March 1994. "UNFCCC" is also the name of the Secretariat charged with supporting the operation of the convention, with offices on the UN Campus in Bonn, Germany. The convention's main objective is explained in Article 2. It is the "stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic .e., human-causedinterference with the climate system". The treaty calls for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kyoto Protocol
The was an international treaty which extended the 1992 United Nations Framework Convention on Climate Change (UNFCCC) that commits state parties to reduce greenhouse gas emissions, based on the scientific consensus that global warming is occurring and that human-made CO2 emissions are driving it. The Kyoto Protocol was adopted in Kyoto, Japan, on 11 December 1997 and entered into force on 16 February 2005. There were 192 parties (Canada withdrew from the protocol, effective December 2012) to the Protocol in 2020. The Kyoto Protocol implemented the objective of the UNFCCC to reduce the onset of global warming by reducing greenhouse gas concentrations in the atmosphere to "a level that would prevent dangerous anthropogenic interference with the climate system" (Article 2). The Kyoto Protocol applied to the seven greenhouse gases listed in Annex A: carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexaflu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Warming
Present-day climate change includes both global warming—the ongoing increase in global average temperature—and its wider effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes to Earth's climate. The current rise in global temperatures is driven by human activities, especially fossil fuel burning since the Industrial Revolution. Fossil fuel use, deforestation, and some agricultural and industrial practices release greenhouse gases. These gases absorb some of the heat that the Earth radiates after it warms from sunlight, warming the lower atmosphere. Carbon dioxide, the primary gas driving global warming, has increased in concentration by about 50% since the pre-industrial era to levels not seen for millions of years. Climate change has an increasingly large impact on the environment. Deserts are expanding, while heat waves and wildfires are becoming more common. Amplified warming in the Arctic has c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulmus Serotina
''Ulmus serotina'', the September elm, is an autumn-flowering North American species of tree. It is uncommon beyond Tennessee; it is only very locally distributed through Illinois, Kentucky, Arkansas, Mississippi, Oklahoma, Alabama, and Georgia, and disjunct populations into Nuevo León, Mexico. It grows predominantly on limestone bluffs and along streams to elevations of 400 m.Duncan, W. H., & Duncan, M. B. (2000). ''Trees of the Southeastern United States'', 234–238. Athens, Georgia, USA. Description Rarely exceeding 20 m in height, the tree has a rounded crown with spreading to pendulous branches. The glabrous young shoots become progressively corky-winged with age, and bear oblong to obovate leaves Washington, D.C., US. Acc. no. 55431. ;Europe *Grange Farm Arboretum, Sutton St James, Spalding, Lincolnshire, UK. Acc. no. not known. *Royal Botanic Garden Edinburgh, UK. Acc. no. 20080091, from seed wild collected in USA. *Royal Botanic Gardens, Kew, UK. Acc. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abies Fraseri
The Fraser fir (''Abies fraseri''), sometimes spelled Frasier fir, is an endangered species of fir native to the Appalachian Mountains of the southeastern United States. They are endemic to only seven montane regions in the Appalachian Mountains. Taxonomy ''Abies fraseri'' is closely related to '' Abies balsamea'' (balsam fir), of which it has occasionally been treated as a subspecies (as ''A. balsamea'' subsp. ''fraseri'' (Pursh) E.Murray) or a variety (as ''A. balsamea'' var. ''fraseri'' (Pursh) Spach).Farjon, A. (1990). ''Pinaceae. Drawings and Descriptions of the Genera''. Koeltz Scientific Books .Liu, T.-S. (1971). ''A Monograph of the Genus Abies''. National Taiwan University.Flora of North America''Abies fraseri''/ref>Gymnosperm Database''Abies fraseri''/ref> Some botanists regard the variety of balsam fir named ''Abies balsamea'' var. ''phanerolepis'' as a natural hybrid with Fraser fir, denominated ''Abies × phanerolepis'' (Fernald) Liu. Names The species ''Abies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
