1.  The type of power station that affects the environment by polluting the atmosphere with sulfur

       dioxide is the coal-fired power station.

  2.  a) The 4 non renewable energy sources are: coal, oil, gas and nuclear fuel (uranium & plutonium).

       b) The non renewable energy source that makes the least contribution to global warming is
   
           nuclear fuel.

  3.  The type of power station that has the longest start-up time is: d) Nuclear

  4.  The two statements about hydroelectric power stations that are false are:

       b) They take a long time to start up

       d) They are not very reliable

  5.  The unreliable energy source is wind.

  6.  Electricity that is produced from wind farms costs more than electricity produced from fossil fuel

       power stations because each wind turbine has a low output, so a large number of wind turbines

       are need to produce as much electricity as a fossil fuel power station.