Then, the only limit will be how much plant material is available (see article).

ECONOMIST: The future of energy

Until now, if a developer was granted planning permission they had to start the build within five years but once a "material start" had been made there was no time limit on its completion.

BBC: 'Eyesore' at former Strand hotel site being demolished

The sheer scale of the task facing Ford could also limit the effectiveness of its plans to stamp out smut, sexist and racist material.

BBC: The problems of finding filth