Any energy type generated from natural resources like sun, water, or wind is termed green energy. Even though green energy is derived from renewable resources, there are some distinctions between renewable and green energy.
In general, it is a resource that does not produce pollution, unlike fossil fuels. For example, generating power by burning organic material from sustainable forests is renewable but it is not necessarily green energy. This is because of the CO2 produced by the burning itself.
Green energy sources are naturally replenished and do not include drilling or mining operations. Thus, no damage is done to the ecosystem and environment.
Today, there are numerous examples to showcase the usability of green energy.
It is derived from renewable energy technologies which work in different ways. They can draw power from the sun with solar panels or via wind turbines for harvesting wind energy.
Hydroelectric, solar, and wind energy are the main sources of green energy. Out of these, solar and wind are now efficiently harvested on a small scale like rooftops. Overall, 6 common forms are as follows:
This energy uses the power of flowing water in streams, rivers, and dams to generate electricity. This is also known as hydroelectric power. It can work on both small and large scale.
Photovoltaic (PV) cells capture sunlight and turn it into electricity. Solar power has now become affordable for domestic purposes like garden lighting and for heating buildings and hot water. Moreover, it can also be used on a much larger scale like powering a utility grid.
Wind turbines use the power of the airflow around them to generate electricity. This is suitable for offshore areas or high-altitude sites.
Accelerated hydrogen production from aluminum and seawater, is the new approach towards clean hydrogen production.
Thermal energy used under the Earth’s crust is used in this. In this green energy source, drilling is required but once tapped it becomes a huge energy resource. Some regions have easy-to-access geothermal resources, and it is a location-intensive resource. And as it involves drilling, this methods needs to be carefully managed to be counted as a type of green energy.
In biomass power plants, combustible organic waste, wood waste, and sawdust are used for generating green energy. However, there is some GHG emissions from this process but it is better than petroleum-based process.
In this process, organic materials are converted into fuels like biodiesel and ethanol. It is estimated that biofuels will have the capacity to meet more than 25% of the global transportation demand by 2050.
It is interesting as to how Bronze Age firebrick technology could pave affordable path to Net Zero emissions for 149 countries.
On the other hand, wind or solar energy is ideal for other geographical locations. However, combining various green energy sources and upsizing their production gives us the possibility to phase out fossil fuels.
Wind farms are considered the most efficient as they require less refining and processing than other sources. Moreover, with composite testing and technology, the lifespan and Levelized Cost of Energy (LCOE) of wind turbines have also improved. Furthermore, depending on the conditions, the efficiency of green energy is determined.
Efficiency in green energy is slightly dependent on location as, if you have the right conditions, such as frequent and strong sunlight, it is easy to create a fast and efficient energy solution.
For accurately comparing energy types, it is important to analyze the full life cycle of each energy source. It also includes the evaluation of energy required to produce the green resource, considering any environmental disruptions caused in the process.
Currently, the following order is considered as follows:
Generally, green energy and renewable energy are considered the same and to some extent they are. However, the noticeable difference is that there are no emissions in the manufacturing of green energy. Whereas, to harvest renewable energy devices are manufactured leading to emissions at manufacturing and transportation levels.
Cross-Reference: What is Green Energy
In conclusion, green energy is the sustainable option for the future to decarbonize the atmosphere and achieve the net-zero goal.
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Green energy is any energy type that is generated from natural resources, such as sunlight, wind or water. It often comes from renewable energy sources although there are some differences between renewable and green energy.
The key with these energy resources are that they don''t harm the environment through factors such as releasing greenhouse gases into the atmosphere.
As a source of energy, green energy often comes from renewable energy technologies such as solar energy, wind power, geothermal energy, biomass and hydroelectric power. Each of these technologies works in different ways, whether that is by taking power from the sun, as with solar panels, or using wind turbines or the flow of water to generate energy.
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