The good news is that it has been estimated that we could generate enough sustainable energy to meet demand as can be seen in the bar graph below. In fact we could produce almost double the energy demand by 2050 with solar and wind. It just needs the political will to prioritise sustainable energy over fossil fuels.

The National Grid projects that Britain will need 900 TWh in 2050 and the UK’s Department For Industrial Strategy says 1250 TWh so the numbers in the bar graph above are conservative. It has been suggested that the gap between supply and demand would leave room for the production of cultivated meats, direct air capture, or intensive manufacturing and hydrogen production. We would need some land and ocean to do this and a summary of these sources can be seen in the table below.

For more details see the source of this information: Can  solar and wind power Britain? An update of David MacKay’s numbers.


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