CLIMATE CHANGE
Most of our electricity comes from power stations that use non-renewable energy sources, as a result, it causes an impact in the environment.

POWER STATIONS THAT USE RENEWABLE ENERGY SOURCES

There are many types of power stations that use renewable sources, such us: wind power, hydroelectric power, solar power, marine power, geothermal power and biomass powersR

HYDROELECTRIC POWER STATIONs:
-Conventional hydroelectric stations
-Pumped-storage hydroelectric stations

SOLAR POWER STATIONS
They use energy from sunlight to generate electricity. There are two types of solar power stations:

Solar thermal stations
They can use sunlight in two ways:
-With solar collectors that absorb sunlight to produce heat
-With mirrors called heliostats, that reflects and concentrate sunlight in one place.

Photovoltaic stations
Here, solar panels convert sunlight directly into electricity. Each panels contains many photovoltaic cells.

BIOMASS POWER STATIONS
Biomass is any organic material that is produced by natural processes.
In a biomass power station, the fuel used to produce energy comes from biomass. 

MARINE POWER STATIONS
They use the movement of ocean water te generate electricity. They are very expensive and not vere efficient. There are three types of marine power stations:
-Tidal power stations
-Wave power stations
-Ocean thermal conversion stations

GEOTHERMAL POWER STATIONS
They use heat from the deepest underground layers of our planet. This energy can be used in two ways:
Directly, to provide hot water for heating and industrial uses.
Indirectly: to drive generators to produce electricity.

ELECTRIC POWER STATIONS THAT USE NON-RENEWABLE ENERGY SOURCES

There are two types: Thermal power stations and nuclear power stations.

THERMAL POWER STATIONS
Thermal power stations use fossil fuels to produce thermal energy. Than the thermal energy is converted to mechanical energy, in order to generate energy.

Combined-cycle power stations

A combined-cycle station is more efficient than single-cycle stations because it has two systems that produce more energy.
burns natural gas with compressed air, and the gases that it produced, they turn a turbine.
The second system uses the steam from the first system. That steam turns another turbine to produce more electricity.

NUCLEAR POWER STATIONS
A nuclear power station is a thermal power station that uses a nuclear reactor to produce heat. The reactor usesradioactive material as fuel.

ELECTRICAL ENERGY

It is a form of energy that is transported by an electrical current.

ELECTRIC POWER STATIONS
A power station is a place where energy from natural resources is transformed into energy that we can consume.

THE TRANSPORTATION AND DISTRIBUTION OF ELECTRICITY
Electrical energy must be transported from power stations to the places where it is needed. The transportation of electrical energy includes:
-Raising the voltage
-High voltage lines
-Reducing the voltage
-Final

ENERGY SOURCES

They are natural resources that we can use to generate different forms of energy. Then we can transform that energy for various purposes.

There are two types of energy sources: renewable and non-renewable.

NON-RENEWABLE ENERGY SOURCES
They come from natural resources that are limited. It would take millions of years to generate these sources of energy. The most commonly are fossil fuels and nuclear energy.

RENEWABLE ENERGY SOURCES
They comme from natural resources that we can´t set up completly. These include:

hydroelectric

solar

marine

geothermal

biomass.

ENERGY TRANSFORMATIONS

There are various types of energy transformations. We can transform chemical energy into other types of energy: 

1.Luminous energy  3.Sound energy
2.Thermal energy    4.Mechanical energyWe can transform electrical energy into:
1.Kinetic energy
2.Heat
We can transform nuclear energy into:
1.Luminous energy
2.Thermal energy
We can transform luminous energy into electrical energy.

ENERGY

Energy is the capacity of a body to perform transformations and do works.