Nuclear energy

Fossil-fuel energy

Hydroelectric energy

Biomass energy

Geothermal energy

Wind energy

Solar energy

Renewable energy is energy which comes from natural resources such as sunlight, wind, biomass, rain, oceans and geothermal heat. So the market for renewable energy technologies has continued to grow. Climate change concerns, coupled with high oil prices, peak oil, and increasing government support, are driving increasing renewable energy legislation, incentives and commercialization.

Coal, oil, natural gas (the so called “fossil fuels”) and uranium are non-renewable resources that once exhausted can never be returned to their original form.

No doubt our planet is full of energy resources but it is our duty to exploit only those reserves that cannot cause harm to the environment.

Types of energy

Advantages Disadvantages

Sun energy Energy source is free;causes no pollution

Expensive; supply of sunlight can be interrupted

Wind energyEnergy source is free;causes no pollution

Only practical in areas with strong steady winds

Hydroelectric energy

Station cheap to operate; causes no pollution

Stations can only be built in certain locations

Geothermal energyEnergy source is free;causes no pollution

Only practical in a few locations

Biomass energy

The fuel tends to be cheap; less demand on the Earth’s resources

By burning the fuel, it makes greenhouse gases

Types of energy Advantages Disadvantages

Fossil – fuel energy Efficient, reliable

Limited supply of fuel in the world; waste of resources; pollution

Nuclear energyRequires little fuel; produces little air pollution

Produces radioactive waste; stations expensive to build

- Sun energy- Wind energy- Hydroelectric energ

y- Geothermal energy- Biomass energy

- Nuclear energy- Fossil - fuel energy