What are the main energy sources used by man ? What are the problems they generate ?
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What is energy ?

What is energy ? | What are the main energy sources used by man ? What are the problems they generate ? | Scoop.it

Energy is ability to do work, and work is moving something against a force. It is measurable in Joules (J, the most known unit), British thermal unit (Btu, the amount of heat needed to raise by one degree Fahrenheit the temperature of a pound of water). This article deals with all energies used since the beginning of life. It is said that the oldest energy is fire but with the advent of the Industrial Revolution, the use of fossil fuels began growing as much as the number of industries that were set up. Nuclear power has been used as an energy source only since fifty years, so most of fossil energies has been used and will disapeared.

But other problems are generated : in the past century, it became obvious that the consumption of non-renewable energy sources is causing more environmental damage than any other human activity. These fossil fuels are causing problems such as ozone depletion and global warming. This website article was published in 2007 and its information are coming from The Energy and Resources Institute (TERI in New Dehli), by Darbari Seth Block, IHC Complex and Lodhi Road.

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Energy Resources

Energy Resources | What are the main energy sources used by man ? What are the problems they generate ? | Scoop.it

This article was made by a British Science teacher with a Physics specialism which seems to be often offering some online knowledge for students. He starts introducing some sources of energy by saying that they are all coming from the Sun. You also can watch the current world energy production evolving !

On the left side of this small inroduction, you can click on the energy source you are interested in and learn more things about it through short videos and some small and clear explanations. Every energy is associated with some of its main uses,the new technologies linked to it and with its current issues.

Most of the power station (nuclear, fossil fuels, hydroelectric, wind...) are following almost the same system : turbins are turning (with the help of wind or steam) and so generators are turning and making electricity.

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Energy Source Comparison

Energy Source Comparison | What are the main energy sources used by man ? What are the problems they generate ? | Scoop.it

In this website, energies are classified in two categories: potential (that is stored in an object) and kinetic (the one that does the work).

It deals with the sources of energy used by man, the main ones and the less important ones, and some of the problems they generate.For each energy, we learn how it is extracted, how we use it, and what problem it causes. We can learn about non-renewable energies that are causing well-known problems. Also we can read about the renewables ones, and learn that even those, whiwc are supposed to be without any environmental impact, have some issues that must be fixed in order to be completely clean sources of energy. There are many challenges in the 21st century, like the search for new technologies in order to bring energy to everyone easily. You can discover more informations about energies with the links of ressources of this website, made by SPE (Society of Petroleum Engineers) since 2006 and udapted this year, which intends to provide knowledge about energies for public benefits or professional ones.

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