Question

Name two energy sources that you would consider to be renewable. Give reasons for your choices.

Answer 1

Hint: A renewable energy source means energy that is sustainable – something that can not run out, or is endless. Fossil fuels are not renewable sources of energy because they are not infinite. They even release carbon dioxide into our atmosphere which contributes to climate change and global warming.

Complete answer:
The most popular renewable energy sources are
>Solar energy: Sunlight is one of our planets most abundant and freely available energy resources. The amount of solar energy that reaches the earth’s surface in one hour is more than the planet’s total energy requirements for a whole year. The amount of solar energy we can use varies according to the time of the day and the season of the year as well as geographical location.
>Hydro energy: As a renewable resource, hydro power is one of the most commercially developed. By building a dam or barrier, a large reservoir can be used to create a controlled flow of water that will drive a turbine generating electricity. This energy source can often be more reliable than solar or wind power and also allows electricity to be stored for use when demand reaches a peak.
>Wind energy: Wind is a plentiful source of clean energy. To harness electricity from wind energy, turbines are used to drive generators which then feed electricity into the nation grid.
>Biomass energy: This is the conversion of solid fuel made from plant materials into electricity. Biomass involves burning organic materials to produce electricity, this is not burning wood and nowadays this is a much cleaner, more energy efficient process.
>Tidal energy: This is another form of hydro energy that uses twice – daily tidal currents to drive turbine generators. Although tidal flow unlike some other hydro energy sources is not constant.
>Geothermal energy: By harnessing the natural heat below the earth’s surface, geothermal energy can be used to heat homes directly or to generate electricity.

Note: As world population rises day by day , so does the demand for energy in order to power our homes, businesses and communities. Innovation and expansion of renewable sources of energy is key to maintaining a sustainable level of energy and protecting from climate change. Renewable energy sources make up 26% of the world’s electricity today.