renewable energy

What is renewable energy?

Energy exists freely in nature. Some of them exist infinitely , the rest have finite amounts.

You will notice that water, wind, sun and biomass (vegetation) are all available naturally and were not formed. The others do not exist by themselves, they were formed. Renewable energy resources are always available to be tapped, and will not run out. This is why some people call it Green Energy.

When can energy be called 'Renewable'?

• When its source cannot run out or can easily be replaced.
• When their sources are carbon neutral. This means they do not produce Carbon compounds.
• When they do not pollute the environment.

TIP:

Approximately 20% of electricity produced globally in 2009 came from renewable sources. Out of this, hydro-power accounted for about 16%.