• Can produce big quantities of electricity

• Easy to find and extract

• Cheap

• Easy to transport

• Safe

• Very abundant

• Pollution

• Global warming

• Might be dangerous to transport or burn fuels

• Non-renewable

• Damage to the environment or our health

• Abundant

• Renewable energy doesn't harm the environment, and is renewable.

• Efficient and has good uses

• Might be costly to harvest (e.g. wind turbine)

• Some types are non-renewable

• Energy such as from fuels causes pollution

Natural solid fuels include wood, coal, peat and dung. Coke and charcoal are classified into artificial solid fuels. This type of fuel usually gives off heat after undergoing the process of combustion, and was therefore used to create fire. The main method for extracting solid fuels is mining. This might cause problems such as health effects, habitat loss, environmental issues such as pollution and others.

Fossil fuels are commonly used in the form of petroleum, coal or natural gas. These fuels contribute greatly to global warming but suitable alternatives haven't been found. There are two ways for obtaining fossil fuels from the ground: mining and drilling. Mining involves digging the Earth and unearthing solid fuels such as coal. Drilling forces fuels such as oil or natural gas, to surface.

Fuels in the form of liquid or gas are mainly drawn to the surface by drilling. Examples of liquid fuels include petroleum (natural), diesel, gasoline, kerosene, and ethanol (artificial). Liquid fuels contribute greatly to transportation and economy. Gaseous fuels include natural gas, hydrogen, propane, methane, coal gas and water vapor. Many of these can be used in the form of heat or light energy which can be easily transported.

This type is made up of biomass and comes from a carbon source which refills quickly such as plants. Biomass fuel can be immediately used for heat or power. The plant-derived fuel, wood, was probably the first to be of use to ancestral humans. Biofuels such as bioethanol and biodiesel are used for transport but the matter of how carbon efficient they are remains a widespread argument.

Derived from electric charges. The positive and negative charge particles can either attract with opposing charges or repel with like charges. The faster the charge particles move, the more the amount of electrical energy.

Sound energy is produced when a force causes a matter give off vibrations. It can be heard by living organisms when the vibrations get sensed by mechanisms in the ears. Sounds can travel in solids, liquids and gases but not in vacuum.

This type of energy comes from nuclear reactions. In nuclear power plants, uranium is used to give off heat by undergoing nuclear fission and the heat then can be used to produce steam. The steam then passes through a generator which, in turn, produces electricity.

The word 'kinetic' itself means motion so kinetic energy is energy in the form of movement. It can also be defined as the amount of work needed for an object or matter to reach its speed. Given that, the amount of kinetic energy doesn't change unless the speed changes.

This technology makes use of photovoltaic cells or solar cells to capture energy from the sun into electricity through the photovoltaic effect. The energy conversion is both physical and chemical. Lots of these solar cells are packed into a large electric device called a solar panel. The electrical current is created when electrons from two layers of silicon (positive and negative) come 'loose' and are set into motion by electrical fields.

Electricity is generated by turning wind turbines. The wind is very suitable for this purpose as it it continuously moving and would easily move big blades especially in strategic locations. This mechanical energy is converted to electrical energy by the generator inside the turbine. In addition to clean energy, wind turbines also take a relatively small space as the most of the material is directed upwards.

This energy uses heat from the Earth's core. In geothermal power plants, wells are dug 1-2 miles beneath the Earth's surface to pump water underground. The water will then return to the surface as steam through another pipe. The steam then spins a turbine connected to a generator which converts mechanical energy to electricity. The steam is then cooled and turned to water to repeat the process again.

Hydropower uses the force of water currents to produce electrical energy. In hydro plants, situated in rivers or other bodies of rapidly flowing water, water spins turbines which converts the kinetic energy of water to mechanical energy. A connecting generator then converts it to electricity. The energy generated by a hydropower plant depends on how far the water falls and how much the amount of falling water is.