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What Is Green Power?

Green power is electricity that's produced from renewable sources like solar, wind, geothermal, some forms of biomass and hydroelectricity with low impact. Customers in deregulated markets are able to add a small fee to their utility bills to help support renewable energy sources that are cleaner.

Renewable energy sources are typically less harmful to the environment than coal or oil mining. They can also reduce greenhouse gas emissions.

Solar Energy

Solar energy is one of the most popular green power (more info here) sources. Solar energy is a renewable source since it never runs out. It is an efficient, clean and secure energy source that can reduce greenhouse gas emissions as well as pollution of the air from fossil fuels like coal, natural gas and oil. This energy source is also a good alternative to nuclear power mobility, which requires mining and extraction of uranium as well as long-term storage of radioactive waste.

Photovoltaic panels, and concentrated solar-thermal energy (CSP) are all methods to harness the power of the sun. Solar power can be distributed directly to businesses and homes or to grids which distribute power to other. Certain consumers can sell their excess energy back to the utility company, which helps reduce electricity bills and even offset rising utility costs.

Solar energy doesn't produce emissions or air pollutants unlike fossil fuels that produce harmful gases and carbon dioxide when they are burned. Solar energy can also be used to power different types of devices, such as satellites, boats and spacecrafts that cannot connect to the electrical grid is either impossible or not practical.

Solar power can be used in smaller buildings. Many homeowners put PV cells on their roofs to produce electricity. Passive solar design of homes allows for these homes to receive the sun's warmth during the day and retain it in the evening. Solar-powered homes also benefit from the fact that they require very little maintenance.

Another form of solar power is hydropower, which utilizes the natural flow of the water in streams, rivers and dams to generate electricity. Like biomass and wind hydropower, hydropower is a renewable resource because it can be replenished. Look through 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 plant uses the heat of the Earth to produce electricity. The process utilizes hot water and steam that naturally occurs a few kilometers below the surface of the Earth. It is a sustainable and renewable energy source that generates electricity 24 hours a day all year round. Geothermal energy can reduce our dependence on fossil fuels, and is one of the most eco-friendly methods of energy generation.

The most popular type of geothermal power plant is a flash-steam power station. This makes use of water at a temperature of about 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 uses geothermal power to melt snow and heat its streets, sidewalks and parking spaces in the frigid Arctic Winter.

A hot dry rock power plant is another geothermal source of energy. It taps underground reservoirs made up of hot, dry rock that has been heated by either natural processes. HDR plants are less difficult to construct and operate since they require less infrastructure. According to the National Renewable Energy Laboratory, there are enough HDR resources in the United States for all of our current electrical requirements.

Steam from geothermal power stations can be utilized to generate electricity through a steam turbine generator or combined with gas-fired turbines to improve efficiency. The resultant mixture could be converted into natural gas, which is then burned in a conventional boiler to produce electricity.

In addition to being clean and reliable, geothermal energy also has the smallest carbon footprint among all renewable energy sources. Binary-cycle plants, which use an engine to convert steam into electricity, generate very little nitrous oxide, methane or sulfur dioxide.

However, despite its benefits, geothermal energy isn't without its difficulties. The drilling required to establish geothermal power stations can cause earthquakes and may cause groundwater pollution. Injection of high-pressure streams into geothermal reservoirs may also cause subsidence. This is a slow sinking that could damage roads, structures pipelines and buildings.

Biogas

Biogas is an energy source made of renewable gaseous substances that can generate green power. It can be produced from manure, agricultural waste, plant material and municipal waste, sewage, food waste and other organic waste materials. Biogas can be converted to transport fuels, electricity, heat and energy, combined heat and energy, or electricity using the Fischer-Tropsch method. Biogas is also a viable source of hydrogen that can be produced renewable for use in fuel cells which are likely to play a major role in the future of energy systems.

The most common method of valorisation of biogas is to generate electricity by using the power of a combined heat and (CHP) plant. The heat generated by the CHP plant is used to fuel the fermentation of organic wastes, and the electricity is then fed back to the grid. Alternatively, it can be converted into natural gas and incorporated into the existing distribution networks for natural gas. Biogas can be used to substitute for natural gas imported from mines in commercial, ground transportation and residential buildings.

In addition to providing renewable energy, biogas can help reduce carbon dioxide emissions and pollution from cooking conventionally. The CCAC is working to provide tools to measure, report and confirming (MRV) of clean cooking in households and communities in low-to-middle income countries, to help the 67 countries that have incorporated clean cooking targets in their Nationally Determined Contributions (NDCs).

By using biogas as an alternative to traditional natural gas for cooling and heating, and to replace fossil fuels used in electricity generation, carbon dioxide emissions will be reduced. Biogas can be used in the production of liquid transport fuels that can be an alternative to oil, coal and other fossil fuels.

Recovering methane from animal manure and food waste prevents the release of greenhouse gases into the atmosphere, as well as preventing nitrogen runoff that could otherwise cause water pollution. The Plessis-Gassot landfill for non-hazardous waste in Claye-Souilly, France, for instance, captures biogas and turns it into a renewable source of energy for the households that are connected to the system. In addition small-scale biogas facilities can be set up in cities to facilitate the collection and use of local organic waste which will reduce greenhouse gases associated with the transport and treatment of these materials.

Hydroelectric Power

Hydropower is a renewable energy source that is based on the kinetic energy of flowing water. It is the biggest and most affordable renewable power source in the world. It doesn't emit direct greenhouse gases but it does have significant environmental effects. It is a flexible green power scooter reviews power source that is easily modified to meet changes in supply and demand. Its service life spans over 100 years, and it is able to be upgraded to improve efficiency and performance.

The majority of hydropower plants that are traditional use dams to harness the energy generated by falling water. A series of turbines converts kinetic energy from the water into electricity at a rate that is proportional to the speed at which it travels. The electricity is then transmitted to the grid for use.

Hydroelectric power plants require a significant investment in reservoirs and pipes. However the operating costs are minimal. These flexible plants can also be utilized as backups to other intermittent renewable energy sources like wind and solar.

There are two major types of hydroelectric plants that are run-of-river and storage. Storage plants have huge impoundments, which can hold more than a season's worth of water. Run-of-river plants use water from rivers and streams that flow freely. Hydropower plants are often located near or in areas of high density of population, where electricity demand is high.

The environmental impact of hydropower largely is dependent on the size and location of the dam and the amount of water displaced, and the wildlife habitats and habitats affected by decomposition and inundation. The effects of hydropower can be mitigated and diminished by utilizing Low Impact Hydroelectricity Standards (LIHI) for the construction and operation of a hydropower project. The standards include measures to control the flow of rivers, water quality protection and fish passage, as well as protection of aquatic ecosystems endangered and threatened species, recreation and cultural resources.

Some hydropower plants are also the world's largest "batteries" because they generate renewable energy by pumping water from a lower reservoir uphill to a bigger reservoir. When electricity is required, the water from the lower reservoir could be used to power generators. The water from the upper reservoir can then be pumped downhill through a turbine to create more electricity.