Just a tiny fraction of the Sun’s energy that hits the Earth (around a hundredth of a millionth of a percent) is enough to meet all our power needs many times over.

The Earth’s tides are due to gravitational interaction with the Moon and Sun and the Earth’s rotation, therefore tidal power is practically inexhaustible.

The total amount of economically extractable power available from the wind is considerably more than present human power use from all sources.

The unsexy but cheapest solution to climate change often with less than 5 year pay back times. Thirty per cent less energy would be needed in the UK with widespread deployment of energy efficiency initiatives.