What renewable energy sources are unreliable?

Renewable and non-renewable energies

The use of renewable energy is far from being able to displace the use of energy sources from fossil fuels, since for centuries companies, machinery, the supply of petroleum products, etc., have covered a large part of the world’s energy needs.

But do you know how dependent we are on non-renewable energy? The drive of industry dates back to the invention of the steam engine, through changes to the creation of vehicles that run on gasoline or diesel. In fact, today’s stoves run on electricity, but the use of gas has not been neglected.

Among the advantages and disadvantages of the use of fossil fuels in the generation of electric energy, it plays a decisive role that previously a study of the social, economic and environmental impact is carried out, in addition to defining the conditions of its extraction and sale, thus avoiding unnecessary environmental impacts.

Main energy sources in Europe

The so-called renewable energy sources (sun, wind and water) are those that can be used permanently because they are inexhaustible, unlike non-renewable sources (oil or coal).Tags: From an environmental point of view, we can speak of the existence of two types of energy sources: renewable and non-renewable.

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Among the types of renewable or non-depletable energy sources are: solar energy, wind energy, hydroelectric energy, biomass and biofuels, geothermal energy and energy generated by waves, tides and ocean currents.

It is the energy obtained directly from the sun (which is, at the same time, the source of all renewable energies). Depending on the mechanism used, heat or electricity can be obtained.

Low-power wind power installations (as well as photovoltaic solar energy installations) allow any consumer to generate his own electricity, i.e. to generate his own electricity.

Renewable energies in the world

The original Directive on renewable energy sources, adopted in co-decision on 23 April 2009 (Directive 2009/28/EC, repealing Directives 2001/77/EC and 2003/30/EC), stipulated that, by 2020, 20% of energy consumption in the Union should come from renewable sources. In addition, all Member States were to achieve a 10 % share of energy from renewable sources in transport fuels. The Directive also listed a number of mechanisms that Member States could implement to achieve their respective targets (e.g. support schemes, guarantees of origin, joint projects and cooperation between different Member States and with third countries), as well as sustainability criteria for biofuels.

In July 2021, as part of the implementation of the European Green Pact package, the Commission proposed an amendment to the Renewable Energy Directive to align its renewable energy targets with its new climate ambition. The Commission proposes to increase the binding 2030 target for the share of renewable sources in the Union’s energy mix to 40%, and promotes the use of renewable fuels, such as hydrogen in industry and transport, with new targets. The energy policy framework for the post-2030 period is under discussion.

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Renewable energies

Renewable energies: technology, economics, evolution and integration into the Electricity SystemEnergy is classified as renewable and non-renewable according to its capacity for renewal. A “renewable resource” is defined as one that is not depleted by its use, since it returns to its original state after use or is regenerated at a rate greater than or equal to the rate at which it is depleted by its use. According to this definition, it is true that some renewable resources may cease to be renewable if their rate of utilization is so high that their total renewal is prevented; however, some of these renewable resources can be classified as perpetual, since their depletion is not possible no matter how intensively they are used[86]. Normally, the use of a renewable resource or energy has the intrinsic characteristic of producing a much lower impact on the environment compared to the use or transformation of non-renewable energy.[87] The use of renewable resources or energy has the intrinsic characteristic of producing a much lower impact on the environment compared to the use or transformation of non-renewable energy.

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Renewable resources or energy. Characterization and technologies.  For illustrative purposes, some of the renewable resources currently used for the production of renewable energy are: water, biomass, solar radiation, wind. In this way (see Technologies and costs of electricity generation):