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--- en:natural-elements [2015/09/29 09:59]
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 **[[Natural resources]]** are natural elements that can be used to satisfy human [[needs]]. This elements can be used to produce electricity, heat and motion energy.
-In order of importance, **electricity** can be produced from Water and gravitational force (Hidroelectricity), Wind, Sun (Solar), Geothermal energy and waves and tides.
+**Electricity** can be produced from Fossil Fuels, Water and gravitational force (Hidroelectricity), Wind, Sun (Solar), Geothermal energy, Biomass and waves and tides.
-Radiation from the sun is also an important source of **heat** that can be used to heat water for domestic or industrial uses. Geothermal energy is also a source of heat, but it is available only in some geographical spots.
+Radiation from the sun is also an important source of **heat** that can be used to heat water for domestic or industrial uses. Geothermal energy is also a source of heat, but it is available only in some geographical spots. Biomass is also a source of heat.
 **[[Fossil fuels]]** play an important role in the economy, since they are extensively used to produce electricity, heat and motion. Fossil fuels are [[non renewable resources]], since they were produced naturally millions of years ago, and are not renewed after it's use.