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What is renewable energy?

Solar, wind and air power are bringing about a clean energy revolution. Here are some things that you need to know about renewable energy - the different types and the advantages and challenges ahead. Plus a look to the future. For enquiries, contact us at EMS Trade. We cover Essex, Kent and the wider Southern England region.

Renewable energy, sometimes referred to as “clean” or “green” energy, is a booming innovation that is bringing down energy costs and delivering on its promise of a cleaner, greener future. Across the world, from Europe to America, solar and wind generation is breaking record after record as they slowly start to penetrate national electricity grids without compromising on electricity.

This means that renewable energy sources are slowly but surely displacing “dirty” energy sources, such as fossil fuels (e.g., coal and oil) in the power sector and offering the benefit of lower emissions and pollution levels.

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What is the definition of ‘renewable energy’?

When we say “renewable energy”, “renewable energy sources” or “green energy”, we mean any energy from a source that does not deplete when used, such as the wind or sun or air. We can use an unlimited amount of sun, air and wind energy because the supply is infinite.
Now that we have innovative and cheaper ways to capture and retain renewable energy from sources such as the sun and wind, renewables are becoming a much more important power source. In Europe, for example, energy from renewable sources made up 34 percent of gross electricity consumption, up from 32 percent in 2018. 
The renewables' expansion is happening on both a large and small scale, from 
rooftop solar panels on homes to giant offshore wind farms and battery plants.

Typical UK Residential Air-2-Air System Installation

What is ‘dirty energy’?

When we say “dirty energy”, we're referring to fossil fuels such as oil, gas, and coal. These are non-renewable (i.e., finite: once they're gone, they're gone for good) and are only available in limited amounts. While it's true that these sources do replenish, it takes a very, very, very long time - in some cases millions of years - for this to happen.

This article is an excerpt from: “What is renewable energy? Definition, types, and challenges”. The full article can be found at It was first written by Luke James, and published on 31-05-2021.

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