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What Is Green Power? Green power is electricity that's produced from renewable sources like geothermal, solar, wind and some kinds of biomass and hydroelectricity that is low-impact. It's available to customers in markets that are deregulated who want to support cleaner energy sources by adding a small premium to their utility bills. Many renewable energies are less damaging to the environment than drilling for coal or oil. They also can aid in reducing greenhouse gas emissions. Solar Energy Solar energy is a popular green energy source. Solar energy is a renewable resource because it never runs out. It is a clean and efficient energy source which reduces air pollution as well as greenhouse gas emissions resulting from fossil fuels such as coal, oil, and natural gas. This energy source is also a viable alternative to nuclear power, which requires extraction and mining of uranium, as well as long-term radioactive waste storage. Solar thermal collectors, photovoltaic panels, and concentrated solar-thermal energy (CSP) are all ways to harness the power of the sun. Solar power can be delivered directly to businesses and homes or to grids that distribute electricity to other. Some consumers even can sell their surplus energy back to the utility company which helps keep electricity bills low and even offset rising utility prices. All forms of solar energy generate zero emissions of pollutants or air, unlike fossil fuels that produce carbon dioxide and other harmful gases when they burn. Solar energy can be used to power satellites, boats, spacecrafts, and other devices that are located in areas where access to the grid is a challenge or even impossible. Solar power can be utilized in smaller structures. Many homeowners use PV cells on their roofs to generate electricity. Passive solar home design lets these homes absorb the sun's heat during the day and store it at night. Solar-powered homes also benefit from the fact that they require very little maintenance. Hydropower is a different type of solar energy that uses the natural flow of rivers, streams and dams. Hydropower, just like biomass and wind is a renewable resource because it can be replenished. Check out the EPA's list of third party certified hydropower options if you want to add it to your office or home. see this utilizes heat from the Earth to produce electricity. The process utilizes hot water and steam that naturally occurs a few kilometers below surface of the Earth. It is a renewable and sustainable energy source that can generate electricity 24 hours a days throughout the year. Geothermal power could reduce our dependence on fossil fuels. It is also one of the most eco-friendly methods of energy generation. The most common type of geothermal power plant is a flash steam power station. This uses water at temperatures of approximately 182deg C (360deg F) to generate electricity and power turbines. The steam can also be used to heat buildings, or other industrial processes. Iceland, for instance, relies on the geothermal power to melt snow, heat its sidewalks, streets and parking lots in the frigid Arctic Winter. A hot dry rock power plant is an additional geothermal source of energy. It taps underground reservoirs that are made up of dry, hot rock that has been heated by either natural activities. HDR plants require less infrastructure than geothermal power plants, making them easier and cheaper to construct and operate. The National Renewable Energy Laboratory estimates that there is enough HDR resources in the United States to meet all of our current needs for electricity. Steam from geothermal power stations can be used to generate electricity by using a steam turbine generator or combined with a gas fired turbine to increase efficiency. The mixture can be converted into natural gas and then burned in a boiler to produce electricity. Geothermal energy is not just reliable and clean, but it also has the lowest carbon footprint of all renewable energy sources. Binary-cycle plants that use an engine to convert steam into electricity generate very little or no nitrous dioxide methane, sulphur and oxide. Geothermal energy comes with its own difficulties, despite its benefits. Exploring for geothermal power stations could cause earthquakes and pollute the groundwater. Injection of high-pressure streams in geothermal reservoirs may also cause subsidence. This is a slow sinking that can damage roads, buildings, and pipelines. Biogas Biogas is a renewable gaseous energy source that produces green energy. It can be produced from manure, agricultural wastes, plants and sewage, municipal garbage, food wastes, and other organic wastes. Biogas can be converted to transport fuels, electricity heat, combined heat and energy, or electricity, using the Fischer-Tropsch method. Biogas can also be used to make renewable hydrogen which is used in fuel cells. Fuel cells are predicted to play a major role in the future energy systems in the world. The most commonly used method for valorisation of biogas is to generate electricity using the use of a combined heat and power (CHP) plant. The heat generated by the CHP plant is utilized to fuel the fermentation of organic wastes, and the electricity is fed back into the grid. It can be further compressed into natural gases and incorporated into existing natural gas distribution systems. Biogas can be used to replace imported mined gas in commercial and residential constructions, ground transportation and other areas. In addition to providing renewable energy, biogas could also help reduce greenhouse gas emissions and pollutants from cooking conventionally. The CCAC is working to provide tools to measure, report and confirming (MRV) of the clean cooking practices within communities and households in low- to middle-income countries to assist the 67 countries that have included clean cooking as a goal in their Nationally Determined Contributions (NDCs). Using biogas to replace fossil fuels for electricity generation as well as a substitute for conventional natural gas for heating and cooling will reduce carbon dioxide emissions and other air pollutant emissions. Biogas is also a sustainable alternative to oil, coal, and other fossil fuels for production of liquid transportation fuels. By capturing and recovering methane to prevent the release of greenhouse gasses into the atmosphere as well as the evaporation of nitrogen that could otherwise pollute our water sources. Plessis-Gassot is a non-hazardous waste disposal in Claye-Souilly (France), for instance it captures and converts biogas into a sustainable source of energy for homes that are connected to the system. Small-scale biogas facilities can be installed in cities, allowing the collection and utilization of organic waste locally. This can reduce greenhouse gas emissions associated with transportation and treatment. Hydroelectric Power Hydropower harnesses the kinetic energy of flowing water to generate electricity. It is the most sought-after and least expensive renewable energy source around the globe. It does not produce direct greenhouse gases, but it has significant environmental impact. It is a flexible form of green energy that can be adjusted to meet the changing demand and supply. It has a service life of more than a hundred years and is able to be upgraded for improved efficiency and performance. Most traditional hydropower plants use dams to harness the energy generated by falling water. The kinetic energy of the water is converted to electricity by the use of turbines which spin at a speed proportional to the speed of the water. The electricity is then transferred to the grid to be used. Although constructing supplemental resources requires a massive investment in dams, reservoirs, and pipes, the operating costs are quite low. Furthermore, these plants can act as backups for other intermittent renewable power sources like wind and solar. Hydroelectric plants can be classified into two kinds: storage and run-of-river. Storage plants have large impoundments, which can store more than a season's worth of water. Run-of-river plants draw streams and rivers that are free-flowing. Hydropower facilities are usually situated near or in proximity to areas of people, in areas where there is a significant demand for electricity. The environmental impact of hydropower is largely dependent on the size and location, the amount of water dispersed, as well as the habitats and wildlife affected by decomposition and flooding. These impacts can be reduced and diminished by utilizing Low Impact Hydroelectricity Standards (LIHI) for the construction and operation of a hydropower project. The standards include measures for the flow of rivers, water quality protection passage of fish, aquatic ecosystems protection, threatened and endangered animals, recreation and cultural resources. In addition to generating renewable energy, some hydropower plants act as the world's largest "batteries." They are called storage facilities pumped by the government and work by pumping water uphill from a lower reservoir to a reservoir higher. When electricity is required the water from the lower reservoir can be used to power generators. The water from the reservoir above can then be pumped downwards by a turbine to create more electricity.
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