The educational resource shows information about the concept windy energy and its advantages and its disadvantages.

The educational resource shows information about the concept of natural gas: Natural gas has a similar origin to oil and is usually found forming a layer or deposit on the top of oil fields.

The educational resource shows information about the concept biomass energy and its advantages and its disadvantages.

The educational resource shows information about the coal: coal is a light, black substance which comes from the fossilization of vegetable matter. Coal is used as an industrial fuel, in power stations and in home heating. There are 4 types of coal: anthracite, bituminous coal, lignite and peat.You can see how they are formed in the following animation.