
Welcome to The Regenerators.
Created in partnership with The European Marine Energy Centre.
Introduction
Renewable energyA natural source of energy that will never run out, such as from wind, the sun, or water. is energy generated from natural resources that are not reduced when we use them, for example the Sun, wind and tides.
Unlike, non-renewableA resource that cannot be replaced when it is used up, such as oil, natural gas or coal. resources, such as coal, oil and natural gas, renewable energy does not contribute to Global warmingThe increase in Earth’s average temperature, mostly caused by the build-up of greenhouse gases in the atmosphere. because it doesn't produce Greenhouse gasesGases such as water vapour, carbon dioxide and methane, in Earth’s atmosphere that trap heat..
We can make use of many different types of renewable energy sources to provide electricity to heat our homes and move our transport.
Types of renewable energy
Examples of renewable energy sources are sunlight, the wind and waves.
Sunlight is transformed into electrical energy using solar s. The energy from wind is transformed into electricity using turbines.

Marine renewable energy is a type of kinetic energyKinetic energy is the energy of something when it is in motion. and is generated by the movement of water in the oceans. It is always available, every day of the year.
Tidal energy

Tidal streamsThe horizontal flow of water through the oceans caused by the continuous ebb and flow of the tide. Tides move based on the gravitational pull of the Moon and the Sun. are created by the gravitational pull of the Moon and Sun on the world’s oceans.
Due to the predictability of the Moon and Sun’s positions, we already know today the exact amount of tidal energy we will have over the next two decades!
Tidal stream devices use the energy from the currents that flow with the tides. In a similar way to the wind turning wind turbines, tidal currents turn tidal energy turbines.

Tidal stream devices
The European Marine Energy Centre (EMEC) tests tidal technologies on the Orkney Islands, off the north coast of Scotland.
- Image source, Orbital Marine Power
Image caption, A tidal stream device at EMEC’s Fall of Warness tidal test site off the Orkney Islands
- Image source, Orbital Marine Power
Image caption, The turbines rest under the water allowing the current to turn the blades
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Watch the video below to see some other design concepts and how they could harness tidal energy at the Fall of Warness test site.