Thames & Kosmos Green Engineering: Clean Energy & Sustainable Living handleiding

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Thames & Kosmos

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Renewable

Energies

Humanity is increasingly switching its energy

supply to renewable energy sources that will

not eventually be used up, like coal and oil, and do

not produce the greenhouse gas carbon dioxide,

which heats up the planet. Renewable energies

include the direct use of solar heat in solar collectors,

the conversion of sunlight into electricity using

photovoltaics, and the use of wind energy. Other

renewable energy sources include hydroelectric power plants,

which generate electricity from the energy of falling or ﬂowing water, and

geothermal power plants, which tap into the

enormous heat reserves within the earth. There are

also energy sources that don’t rely on fossil fuels, like

biomass power plants, which burn plants or

ferment them to produce biogas, which in turn

produces heat and electricity. Then there are

nuclear power plants that use energy-rich

elements such as uranium or thorium.

Renewable energies also have limitations: wind

turbines and solar panels, for example, do not

generate electricity when there is no wind or

sunlight. To ﬁll the gaps, reserve power plants

must be kept on hand or electricity must be imported from abroad. Wind

turbines can also pose a fatal threat to birds and bats, nuclear waste is dicult to store,

and areas used for biomass production are unavailable for growing food.

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