- Renewable energy – energy that lasts forever, eg. solar and wind (key term: sustainable)
- Non renewable energy – energy that has a finite number of resources
Cost –
- Renewable energy initial start up costs are very very expensive
- With nuclear stations, a considerable cost is spent on safely decommissioning a reactor
Renewable / non renewable –
- Reserves of fossil fuels are finite, eventually we will need to find alternate sources
- Petroleum is often used in plastic and pharmaceuticals
Greenhouse gas emissions –
- Burning fossil fuels produces CO2 (greenhouse gas)
- Greenhouse gasses trap heat in the atmosphere and contribute to global warming
Supply and demand –
- Demand for electricity will vary over a period of 24 hours
- Nuclear reactors cannot respond to demand surges as they cannot be turned on and off quickly
- Gas fired power stations – extra generators are able to meet such demands, but are using tonnes of non-renewable energy
- Solar and wind don’t produce energy all the time
Environmental impact –
- Power stations are sight pollutants
- Waste products damage plant and animal life in the area of power stations
- Hot water waste has huge impacts on rivers
Location –
- Power stations can be built within the area of demand (this is because energy is wasted in the transmission)
- Renewable energy sources eg. tidal and geothermal are limited to suitable geographical locations, often very far away from the area of demand