Alternative sources of

power

wind is through setting up “Wind farms”. When they were

first introduced they were very expensive, however, over the years, initial costs have fallen, and therefore the cost of getting electricity from the wind has dropped considerably.

an environmentally friendly way – the turbines do not produce

chemical or radioactive emissions. The ground on which the turbines are positioned can still be used for agricultural purposes.
The disadvantages:
wind farms can be costly to maintain and electricity produced by this method is more expensive than that produced by other means;
the noise has been criticized by some people who live very close to this;
the turbines can cause some slight electromagnetic interference, which can cause interference with television signals and some communication equipments.

tiles.
Designing buildings to collect the heat. Large glass windows, heating

water pipes

in urban areas,
where there is plenty of

available space;
easy to install;
replace the need for other materials, such as tiles;
generate more electricity than is needed at certain times in the day, so can be sold back to local electricity companies.
The disadvantages:
depend on changeable weather;
costly installation.

Solar power

warm from the Earth
Geothermal that is “Earth’s heat”. The centre

of the earth is hot.
Geothermal heat pumps – using series of pipes to circulate fluid through the warm ground.
Electricity production using a turbine driven by steam, which then drives a generator.

steam and very few trace gases;
take up very little land;
geothermal

heat pumps can be used nearly everywhere.
advanced drilling techniques minimize the impact of drilling wells;
electricity produced more “available” as fossil-fuelled power plants produce electricity 65-75% of the time compared to 90% from geothermal power plants.

moon, which creates tidal rises and falls, to produce energy.

cheaper electricity;
once up and running, quite safe to the environment.
The

disadvantages:
tidal power generators can be quite expensive to set-up;
the disruption to the area;
the risk of pollution to the river.

mass of water is held back by the damp and

then suddenly released all at once, sending the water through a turbine at great force.

disadvantages:
creating it there can be tremendous disruption and upset to

the environment, animals and nearby residents;
finding sites large enough for this is quite hard.

by waves.
Building dams or pipes for the water to go

up.

700 kilowatts of electricity per metre could be captured;
if a

suitable site could be found, cheaper and environmentally friendly energy could be created
The disadvantage:
disruptive to other industry, such as fishing.