contrails

On Jan 10, 11:15*pm, delboy wrote:
On 10 Jan, 20:39, Tom Gardner wrote:



On Jan 10, 8:24*pm, Gary Evans wrote:

MacKay has interesting, simple and plainly valid
"normalisation techniques", *one* of which is:
* - work out the land area we each occupy (in the UK)
* * i.e. area/population, which has to be sufficient for
* * all our needs if we are to be self-sufficient
* - for each use to which that area could be put, how
* * much can we extract
* - what are our current needs, and how could they be
* * realistically changed
Examples are energy from wind, energy from crops,
energy for food, energy for cars or busses or trains
or aircraft etc.- Hide quoted text -

- Show quoted text -

The UK Government was very keen on carbon neutral biofuels from crops,
until it was pointed out to them that the land area required would
leave very little for growing food!

Derek Copeland

MacKay is very good at pointing out such woolly thinking.
Or, more accurately, at pointing out that what you gain on
the swings you lose on the roundabouts.