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As long as the water flow is constant, a hydroelectric plant can generate energy 24/7. Small turbines or water wheels can power an individual home or business, while large-scale hydroelectric plants, such as the Hoover Dam, can generate enough power to supply electricity to more than 1 million people. By building large turbines in traditionally windy areas, energy produced by air movement can be converted into useful electricity.

About 11.2 percent of the energy consumed globally for heating,power, and transportation came from modern renewables in 2019 (i.e., biomass, geothermal, solar, hydro, wind, and biofuels), up from 8.7 percent a decade prior . The use of biomass in energy production creates carbon dioxide that is put into the air, but the regeneration of plants consumes the same amount of carbon dioxide, which is said to create a balanced atmosphere. Biomass can be used in a number of different ways in our daily lives, not only for personal use, but businesses as well. In 2017, energy from biomass made up about 5% of the total energy used in the U.S. This energy came from wood, biofuels like ethanol, and energy generated from methane captured from landfills or by burning municipal waste.

There is also a lower risk of environmental problems like fuel spills and minimal issues with emissions, while also reducing the need for imported fuels. With reliable supplies and fuel diversification, renewable energy could meet our power needs for years to come. – renewables contributed a whopping 43.1% of the electricity mix, more than natural gas (34.5%) and coal (1.8%). Combined with low-carbon nuclear energy’s 16% contribution, a milestone was reached with the nation being largely powered by clean energy for a year.

Renewable energy sources will not run out – at least not for many millions of years . They provide a viable alternative to non-renewable resources, such as fossil fuels while many are also environmentally friendly and produce little of no CO2. In addition to this, some renewable energy sources, such as solar and wind farms, create complaints from local people who do not want to live near them.

The production of renewable energy technologies requires rare-earth elements with new supply chains. A household’s solar panels, and batteries if they have them, can often either be used for just that household or if connected to an electrical grid can be aggregated with millions of others. Over 44 million households use biogas made in household-scale digesters for lighting and/or cooking, and more than 166 million households rely on a new generation of more-efficient biomass cookstoves. According to the research, a nation must reach a certain point in its growth before it can take use of more renewable energy.

Despite no sewage system or consolidated waste management system, Quelimane, Mozambique recognizes its role in climate change. It uses organic composted waste for community farming and is conducting experiments in partnership with Sweden into the conversion of food waste into cooking gas. Quito, Ecuador is working to densify its Bus Rapid Transit and Metro transport corridors with a new policy that also supports renewable energy. Depending on how well a developer scores on an eco-efficiency assessment, the developer can apply for a buildable increase, in the designated corridor, above the standard permissible floor area for that zone. The city has also issued green bonds specifically to finance renewable energy investments within its boundaries.

With advanced technology being developed, cellulosic biomass, such as trees and grasses, are also used as feedstocks for ethanol production. Ethanol can be used as a fuel for vehicles in its pure form, but it is usually used as a gasoline additive to increase octane and improve vehicle emissions. The energy costs for producing bio-ethanol are almost equal to, the energy yields from bio-ethanol. However, according to the European Environment Agency, biofuels do not address global warming concerns.

Wind energy has been used for millennia, but onshore and offshore wind energy technologies have evolved over the last few years to maximize the electricity produced – with taller turbines and larger rotor diameters. By harnessing the natural heat below the earth’s surface, geothermal energy can be used to heat homes directly or to generate electricity. Although it harnesses a power directly below our feet, geothermal energy is of negligible importance in the UK compared to countries such as Iceland, where geothermal heat is much more freely available. Some renewable sources are more readily available and effective than others, while some, such as geothermal are of great use in some locations and not in others due to accessibility. However, despite these challenges, renewable energy has the potential to reduce electricity sector emissions by around 80%. Renewable energy is important as it has the potential to provide a ready supply of power without using natural resources.


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The potential for the sun to supply our power needs is huge, considering the fact that enough energy to meet the planet’s power needs for an entire year reaches the earth from the sun in just one hour. However, the challenge has always remained in how to harness and use this vast potential. Even though solar panels could save money in the long run, solar panels and arrays can still be expensive to purchase and install, making the initial switch prohibitive for some. Additionally, not all homes or businesses have the space or ideal sun-facing surfaces to make solar installation possible.

While integrating it into the wider energy system is feasible, it does lead to some additional challenges such as increased production volatility and decreased system inertia. Homeowners and renters can use clean energy at home by buying green power, installing renewable energy systems to generate electricity, or by using renewable resources for water and space heating and cooling. Now that we have innovative and less-expensive ways to capture and retain wind and solar energy, renewables are becoming a more important power source, accounting for more than 12 percent of U.S. energy generation. The expansion in renewables is also happening at scales large and small, from giant offshore wind farms to rooftop solar panels on homes, which can sell power back to the grid. Even entire rural communities are relying on renewable energy for heating and lighting. Renewable energy can play an important role in U.S. energy security and in reducing greenhouse gas emissions.