I read somewhere that it takes a shade over an acre per person to grow enough food and fuel to be relatively self sufficient.
The total land area of the UK is 59M acres more or less.
The total population is IIRC about 60M.
At least 30% of the land is covered either not suitable for anything much - moorland, mountainous etc, or is covered in cities.
It would seem that the answer to a sustainable economy is to nuke Milton Keynes, Manchester, Cambridge, London..and thereby reduce the population and increase the available land area for cultivation.
As well as achieving partial unilateral disarmament.
Seems like a no brainer to me..what does the panel think?