1. Lesson 1: Energy Sources

2.  MUST understand which energy sources we use to generate electricity  SHOULD appreciate why fossil-fuel power stations contribute to global warming  COULD understand how impacts of human activity can be reduced

3.  You need to be able to define the following:  Primary energy source  Secondary energy source  Fossil fuel  Nuclear fuel  Biofuel  Greenhouse gas  Global warming

4. 1)A primary energy source is used in the form it is found; a secondary energy source is produced from a primary energy source. 2)We now use electricity and more forms of transport; reserves of natural gas have been found; we have the technologies to extract energy from nuclear fuel; etc. 3)Fossil fuels take millions of years to produce; we are using them quicker than they are forming. 4) They emit carbon dioxide, a greenhouse gas. 5)a) Mining destroys the local habitat and produces waste. b) Burning fossil fuels produces pollutants. c) Flue ash is produced in large quantities and contains harmful substances. 6)Our use of fossil fuels has increased dramatically in the last century.