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Sun is the source of solar energy.The sun is always present.Using solar energy, does not makethe sun smaller or reduce its abilityto provide energy.It is a renewable energy because sun is always present whether we use it or not.

Power of the wind help to generate thewind.Wind can turn the vanes of wind powered generators to produce electricity.Like the sun, the wind is always present whether we choose to use it power or not. It is a renewable energy because wind is always available whether we use it or not.

Any organic materials that can be converted into energy or into a source of energy.Ex: waste products such as unwantedoil palm parts, spoiled grain, tree limbs,garbage, paper and manure. Using special process, biomass canproduce fuel such as ethanol, methaneand fuel oil.The source of biomass materials can begrown or planted for replenishment.

Formed from the remains of organisms that died millions years ago.

It will take millions of years for petroleum to form if we finish using.

It cannot be renewed or replenished.

So it known as renewable energy.

Developed from the remains of plants that died 400 millions of years ago.The coal-forming plant grew in swamps.It will take millions of years for coal to form.So it is under non-renewable energy.

Natural gas is a fossil fuel and is formed in the same way as petroleum.

It often found where petroleum is found.

It will take millions of years to form.

Natural gas also under non-renewable energy