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Quiz: How Much Do You Know About Green Power?
What Is Green Power?

Green power is electricity that's produced by renewable resources such as geothermal, solar, wind, some forms of biomass and hydroelectricity that is low-impact. Customers in markets that are deregulated are able to add a small fee on utility bills to help promote cleaner energy sources.


Renewable energies are often less harmful to the planet than coal or oil mining. They can also aid in reducing greenhouse gas emissions.

Solar Energy

Solar energy is among the most well-known green power sources. Solar energy is a renewable source because it is never depleted. It is a safe 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. It is an excellent alternative to nuclear power, which requires mining and extraction of uranium and long-term radioactive waste storage.

The sun's energy can be used to generate electricity in many ways that include photovoltaic (PV) panels and concentrated solar-thermal power (CSP) and solar thermal collectors. Solar power can be delivered directly to homes and businesses or to grids which distribute power to others. Some consumers can sell surplus energy to a utility company. This can help lower the cost of electricity and offset rising utility costs.

All forms of solar energy produce zero air emissions or pollutants, unlike fossil fuels that create carbon dioxide and other harmful gases during their combustion. Solar energy can be used to power satellites boats, spacecrafts and other devices that are located in areas where access to the grid is either difficult or impossible.

On a smaller scale solar can also be used to power buildings. Many homeowners install PV cell panels on their roofs to produce electricity, and passive solar home design permits these homes to take in sun's rays during the day to provide warmth and then retain it in the evening. Solar-powered houses also have the benefit of requiring very little maintenance.

Another type of solar power is hydropower, which makes use of the natural flow of the water in streams, rivers and dams to generate electricity. Hydropower, similar to 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.

Geothermal Energy

A geothermal energy plant harnesses heat from the Earth's interior in order to produce electricity. The process utilizes hot water and steam that naturally occur a few kilometers below Earth's surface. It is a renewable and sustainable energy source that can generate electricity 24 hours a day throughout the year. Geothermal energy is a great way to reduce our dependence on fossil fuels, and is one of the most eco-friendly methods of power generation.

The most well-known type of geothermal power plant is a flash-steam power station. It 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 is dependent on geothermal power to melt snow, heat its streets, sidewalks and parking areas during the frigid Arctic Winter.

Another source of energy from geothermal sources is hot dry rock (HDR) power plant, which taps underground reservoirs of hot dry rocks that are heated by man-made or natural activities. HDR plants require significantly less infrastructure than geothermal power plants, making them less expensive and easier to construct and operate. According to the National Renewable Energy Laboratory, there is enough HDR resources in the United States for all of our current electrical needs.

The steam from geothermal power stations can be used as a source of electricity by using steam turbine generators or combined with gas-fired turbines to improve efficiency. The resulting mixture can then be converted to natural gas, which can be burned in a traditional boiler to generate electricity.

In addition to being safe and reliable, geothermal energy has the smallest carbon footprint among all renewable energy sources. Binary-cycle plants, which use an engine to convert steam into electricity, produce minimal or no methane, nitrous oxide, or sulfur dioxide.

However, despite its benefits, geothermal energy isn't without its challenges. The drilling required to establish geothermal power stations can cause earthquakes and may cause groundwater pollution. Additionally, the injection of high-pressure streams into geothermal reservoirs may lead to subsidence, which is a gradual sinking soil that could damage pipelines roads, pipelines, and even buildings.

mobility power scooters is a gaseous renewable energy source that can be utilized to produce green energy. It can be produced from agricultural wastes, manure, plants, sewage municipal garbage, food wastes and other organic wastes. Biogas can be used to transportation fuels, electricity, heat, combined heat and energy, or electricity by using the Fischer-Tropsch method. Biogas is also a valuable resource for producing renewable hydrogen to be used in fuel cells that are expected to play an important role in the future of energy systems.

The most popular method of valorising biogas is to generate electricity by using a combined heat and power (CHP) plant. The heat generated by the CHP plant is used to fuel the process of fermentation of organic wastes, and the electricity is then fed back to the grid. In addition, it can be compressed into natural gas and incorporated into existing natural gas distribution networks. Biogas can be used to replace imported gas in residential and commercial buildings, ground transportation and other areas.

In addition to providing renewable energy, biogas could also help reduce carbon dioxide emissions and pollution from cooking conventionally. The CCAC is working to provide tools for measuring reporting and confirming (MRV) the cleanliness of cooking practices in households in low to middle-income countries. This will aid the 67 countries who have included clean-cooking targets in their Nationally Determined Contributions.

Utilizing biogas to substitute fossil fuels for electricity generation and as a substitute for conventional natural gas in cooling and heating will reduce carbon dioxide emissions as well as other air pollutions. Biogas can also be used to create liquid transport fuels that can be a sustainable alternative to oil, coal, and other fossil fuels.

By collecting and recovering methane to prevent the release of greenhouse gases into the atmosphere as well as the runoff of nitrogen which would otherwise pollute our water resources. The Plessis-Gassot landfill for non-hazardous waste in Claye-Souilly, France, for example, captures biogas and turns it into a renewable source of energy for homes connected to the system. Additionally small-scale biogas plants could be set up in cities to permit the collection and utilization of local organic waste which will reduce greenhouse gases caused by transportation and treatment of these materials.

Hydroelectric Power

Hydropower is a renewable energy source that is based on the kinetic energy of water flowing. It is the most affluent and cheapest source of renewable energy in the world. It doesn't emit direct greenhouse gases, but it has significant environmental impact. It is a highly flexible form of green power that is able to be adjusted to meet the changing needs of demand and supply. It is able to last a life of over a hundred years and is able to be upgraded for improved efficiency and performance.

The majority of hydropower plants that are traditional use dams to harness the energy generated by falling water. The energy generated by the water is converted to electricity by a series of turbines, which spin at a speed proportional to the speed of the water. The electricity is then transferred to the electric grid for use.

Hydroelectric power plants require a large investment in pipes and reservoirs. However the operating costs are low. These plant types can be used as backups for other intermittent renewable energy sources like wind and solar.

There are two major types of hydroelectric plants: storage and run-of-river. Storage plants are characterized by large impoundments, which can store more than one season's worth of water. Run-of-river plants use the water of streams and rivers that are free-flowing. Hydropower facilities are usually located near concentrations of people, in areas where there is a significant demand for electricity.

The environmental impact of hydropower largely is dependent on the size and location of a dam and the amount of water that is displaced and the habitat and wildlife affected by decomposition and flooding. These effects can be minimized and reduced through the use of Low Impact Hydroelectricity Standards (LIHI) for the construction and operation of the hydropower project. The standards cover measures to control the flow of rivers, water quality protection passage of fish, protection of aquatic ecosystems endangered and threatened species, recreation and cultural resources.

In addition to generating renewable energy Hydropower plants also function as the world's biggest "batteries." They are called storage facilities that are pumped and operate by pumping water upwards from a lower pool to a reservoir higher. When there is a need for electricity then the water in the lower reservoir is released to power generators, whereas the water in the upper reservoir is pumped back downhill through a turbine to create more electricity.

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