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Renewable Energy In The United States
According to preliminary data from the US Energy Information Administration, renewable energy accounted for about 12.6% of total primary energy consumption and about 19.8% of the domestically produced electricity in the United States in 2020. Since 2019, wind power has been the largest producer of renewable electricity in the country. Wind power generated 337.9 terawatt-hours of electricity in 2020, which accounted for 8.4% of the nation's total electricity generation and 43.2% of the total renewable electricity generation. By October 2021, the United States nameplate generating capacity for wind power was 129,256 megawatts (MW). Texas remained firmly established as the leader in wind power deployment, followed by Iowa and Oklahoma as of year end 2020. Hydroelectric power is the second-largest producer of renewable electricity in the country, generating around 7.3% of the nation's total electricity in 2020 as well as 36.4% of the total renewable electricity generation. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shepherds Flat Wind Farm 2011
A shepherd or sheepherder is a person who tends, herds, feeds, or guards flocks of sheep. ''Shepherd'' derives from Old English ''sceaphierde (''sceap'' 'sheep' + ''hierde'' 'herder'). ''Shepherding is one of the world's oldest occupations, it exists in all parts of the globe, and it is an important part of pastoralist animal husbandry. Because of the ubiquity of the profession, many religions and cultures have symbolic or metaphorical references to the shepherd profession. For example, Jesus called himself the Good Shepherd, and ancient Greek mythologies highlighted shepherds such as Endymion and Daphnis. This symbolism and shepherds as characters are at the center of pastoral literature and art. Origins Shepherding is among the oldest occupations, beginning some 5,000 years ago in Asia Minor. Sheep were kept for their milk, meat and especially their wool. Over the next thousand years, sheep and shepherding spread throughout Eurasia. Henri Fleisch tentatively suggested ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Thermal Power
Concentrated solar power (CSP, also known as concentrating solar power, concentrated solar thermal) systems generate solar power by using mirrors or lenses to concentrate a large area of sunlight into a receiver. Electricity is generated when the concentrated light is converted to heat (solar thermal energy), which drives a heat engine (usually a steam turbine) connected to an electrical power generator or powers a thermochemical reaction. CSP had a global total installed capacity of 6,800 Megawatt, MW in 2021, up from 354 MW in 2005. Solar power in Spain, Spain accounted for almost one third of the world's capacity, at 2,300 MW, despite no new capacity entering commercial operation in the country since 2013. The United States follows with 1,740 MW. Interest is also notable in North Africa and the Middle East, as well as China and India. The global market was initially dominated by parabolic-trough plants, which accounted for 90% of CSP plants at one point ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wind Farm
A wind farm or wind park, also called a wind power station or wind power plant, is a group of wind turbines in the same location used Wind power, to produce electricity. Wind farms vary in size from a small number of turbines to several hundred wind turbines covering an extensive area. Wind farms can be either onshore or offshore. Many of the largest operational onshore wind farms are located in China, India, and the United States. For example, the List of onshore wind farms, largest wind farm in the world, Gansu Wind Farm in China had a capacity of over 6,000 megawatt, MW by 2012,Watts, Jonathan & Huang, CecilyWinds Of Change Blow Through China As Spending On Renewable Energy Soars ''The Guardian'', 19 March 2012, revised on 20 March 2012. Retrieved 4 January 2012. with a goal of 20,000 MWFahey, JonathanIn Pictures: The World's Biggest Green Energy Projects ''Forbes'', 9 January 2010. Retrieved 19 June 2019. by 2020.Kanter, DougGansu Wind Farm ''Forbes''. Retrieved 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Photovoltaics
Photovoltaics (PV) is the conversion of light into electricity using semiconducting materials that exhibit the photovoltaic effect, a phenomenon studied in physics, photochemistry, and electrochemistry. The photovoltaic effect is commercially used for electricity generation and as photosensors. A photovoltaic system employs solar modules, each comprising a number of solar cells, which generate electrical power. PV installations may be ground-mounted, rooftop-mounted, wall-mounted or floating. The mount may be fixed or use a solar tracker to follow the sun across the sky. Photovoltaic technology helps to mitigate climate change because it emits much less carbon dioxide than fossil fuels. Solar PV has specific advantages as an energy source: once installed, its operation generates no pollution and no greenhouse gas emissions, it shows scalability in respect of power needs and silicon has large availability in the Earth's crust, although other materials required in PV system m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Of The Union
The State of the Union Address (sometimes abbreviated to SOTU) is an annual message delivered by the president of the United States to a joint session of the United States Congress near the beginning of each calendar year on the current condition of the nation. The State of the Union Address generally includes reports on the nation's budget, economy, news, agenda, achievements and the president's priorities and legislative proposals. The address fulfills the requirement in Article II, Section 3, Clause 1 of the U.S. Constitution for the president to periodically "give to the Congress Information of the State of the Union, and recommend to their Consideration such measures as he shall judge necessary and expedient." During most of the country's first century, the president primarily submitted only a written report to Congress. After 1913, Woodrow Wilson, the 28th U.S. president, began the regular practice of delivering the address to Congress in person as a way to rally support ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clint Wilder
Clint Wilder is a business journalist who has covered the high-tech and clean-tech industries since 1985. Biography Clint Wilder is senior editor at Clean Edge, a clean-tech research and strategy firm in the San Francisco Bay Area and Portland, Oregon, where he coauthors reports and writes columns on industry trends and has been a facilitator at the Clinton Global Initiative. He is a frequent speaker at clean-energy and green business events in the U.S. and overseas, and a regular blogger for the Huffington Post. In 2002, Mr. Wilder won the American Society of Business Publications Editors award for best feature series. He is also co-author of ''The Clean Tech Revolution: The Next Big Growth and Investment Opportunity'', published in June 2007, which has been translated into seven languages.Clint Wilder ''Huffington Post''. Wilder's forthco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ron Pernick
Ron Pernick is an American author and the co-founder and managing director of Clean Edge, a developer and publisher of thematic stock indexes tracking clean energy, transportation, water, and the grid. He is an accomplished market research, publishing, and business development entrepreneur with more than three decades of high-tech experience. Biography At Clean Edge, Ron Pernick has co-authored many reports on emerging green technologies and has worked with multinational companies, government agencies, and investors. Mr. Pernick co-authored the first report to identify the business and financial opportunities of clean technology (''Clean Tech: Profits & Potential,'' 2001) and has since helped to popularize the term and advance the sector. Most recently, at Clean Edge, he had led the design and development of multiple clean-energy and sustainable-infrastructure focused stock indexes with Nasdaq including U.S.-listed clean energy (Clean energy, CELS) and global smart-grid and grid ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joint Address To The Congress
A joint session of the United States Congress is a gathering of members of the two chambers of the bicameral legislature of the federal government of the United States: the Senate and the House of Representatives. Joint sessions can be held on any special occasion, but are required to be held when the president delivers a State of the Union address, when they gather to count and certify the votes of the Electoral College as the presidential election, or when they convene on the occasion of a presidential inauguration. A joint meeting is a ceremonial or formal occasion and does not perform any legislative function, and no resolution is proposed nor vote taken. Joint sessions and meetings are usually held in the Chamber of the House of Representatives, and are traditionally presided over by the speaker of the House. However, the Constitution requires the vice president (as president of the Senate) to preside over the counting of electoral votes. Counting electoral votes The Tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barack Obama
Barack Hussein Obama II ( ; born August 4, 1961) is an American politician who served as the 44th president of the United States from 2009 to 2017. A member of the Democratic Party, Obama was the first African-American president of the United States. He previously served as a U.S. senator from Illinois from 2005 to 2008 and as an Illinois state senator from 1997 to 2004, and previously worked as a civil rights lawyer before entering politics. Obama was born in Honolulu, Hawaii. After graduating from Columbia University in 1983, he worked as a community organizer in Chicago. In 1988, he enrolled in Harvard Law School, where he was the first black president of the '' Harvard Law Review''. After graduating, he became a civil rights attorney and an academic, teaching constitutional law at the University of Chicago Law School from 1992 to 2004. Turning to elective politics, he represented the 13th district in the Illinois Senate from 1997 until 2004, when he ran for the U ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern California
Northern California (colloquially known as NorCal) is a geographic and cultural region that generally comprises the northern portion of the U.S. state of California. Spanning the state's northernmost 48 counties, its main population centers include the San Francisco Bay Area (anchored by the cities of San Jose, San Francisco, and Oakland), the Greater Sacramento area (anchored by the state capital Sacramento), the Redding, California, area south of the Cascade Range, and the Metropolitan Fresno area (anchored by the city of Fresno). Northern California also contains redwood forests, along with most of the Sierra Nevada, including Yosemite Valley and part of Lake Tahoe, Mount Shasta (the second-highest peak in the Cascade Range after Mount Rainier in Washington), and most of the Central Valley, one of the world's most productive agricultural regions. The 48-county definition is not used for the Northern California Megaregion, one of the 11 megaregions of the United States. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Geysers
The Geysers is the world's largest geothermal field, containing a complex of 18 geothermal power plants, drawing steam from more than 350 wells, located in the Mayacamas Mountains approximately north of San Francisco, California. Geysers produced about 20% of California's renewable energy in 2019. History For about 12,000 years, Native American tribes built steambaths and thermal pools at the Geysers and used the steam and hot water for healing purposes, as well as spiritual and ceremonial practices, and cooking. The thermal pools were used as a medicinal treatment for rheumatism and arthritis. While the heated muds were used to soothe skin rashes and other aches and pains, using the fumaroles as a natural energy source. When European Americans first entered the area, six Indian tribes inhabited the area around the Geysers, three bands of Pomo people, two bands of Wappo people, and the Lake Miwok people. The Wappo also collected sulfur which they called ''te'ke'' and a Wappo vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geothermal Energy
Geothermal energy is the thermal energy in the Earth's crust which originates from the formation of the planet and from radioactive decay of materials in currently uncertain but possibly roughly equal proportions. The high temperature and pressure in Earth's interior cause some rock to melt and solid mantle to behave plastically. This results in parts of the mantle convecting upward since it is lighter than the surrounding rock. Temperatures at the core–mantle boundary can reach over 4000 °C (7200 °F). Geothermal heating, using water from hot springs, for example, has been used for bathing since Paleolithic times and for space heating since ancient Roman times. More recently geothermal power, the term used for generation of electricity from geothermal energy, has gained in importance. It is estimated that the earth's geothermal resources are theoretically more than adequate to supply humanity's energy needs, although only a very small fraction is currently being ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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