About energy

Energy is everywhere and we use it while doing everything – from cooking cakes to flying to the space. For example food contains chemical energy and our body saves it for future work and games. There are various types of energy:

  • Energy of heat
  • Light energy
  • Kinetic energy
  • Electric energy
  • Chemical energy
  • Nuclear energy
  • Gravitational energy

As usual, electricity, that we use at home, is produced by coal burning, nuclear reaction our by a hydroelectric power station – these are energy sources.

They can be divided into 2 groups:

Renewable (sources that can be easy replenished) and non-renewable sources (sources that can’t be replenished). Both of these groups of sources can be used for secondary energy resources production, including electricity and hydrogen.

Renewable energy sources

  • Solar energy
  • Wind energy
  • Geothermal energy received from the Earth's interior
  • Biomass energy, received from the plants, including charcoal, ethanol received from crops, and biodiesel received from vegetable fat.
  • Hydro energy produced by the help of hydroelectric power stations

Non-renewable energy sources

The main part of energy in Russia is produced by non-renewable energy sources:

  • uranium ore
  • fossil fuels
  • coal
  • nature gas
  • oil