1.   Are green fuels, like Biodiesel, really the solution to our fuel crisis?

2.   For surface transport, although an equally high energy density fuel is unnecessary, an effective method of energy storage is vital.

3.   Fuel is cheaper on the French side of the border.

4.   Inside the rocket, at the closed end, there is fuel, which burns and creates hot gases.

5.   Long-term storage is favoured by environmentalists as less nuclear waste is produced, although spent fuel can not be stored indefinitely.

6.   We were only able to make a rough estimate of how much fuel would be required.

7.   The fuel is highly combustible.

8.   A fuel is a source of energy which can be readily converted into thermal energy when required and stored when not required.

9.   Long-term storage is favoured by environmentalists as less nuclear waste is produced, although spent fuel cannot be stored indefinitely.

10.   The fuel was meant to be heated up to forty degrees centigrade.