ChrisJC said:
SamT said:
That's 'primary' energy Chris, and is a whole other can of worms. Not many fuels fare too well when you start scratching the surface of primary energy. Even dirty coal has to be delivered in trucks.
But surely if your ultimate aim is to save the planet, you do need to open that can of worms!
If the tractor is burning more kiloJoules in Diesel than you will get from the biomass being grown, I would argue that you have actually made the planet worse off.
So you have to include everything you can in your calculations.
Chris.
I totally agree with you. Primary energy is the metric we should all be working with. (And the powers that be will most likely be introducing this in the next verision of the Part L building regs next year).
This topic was not about the pro's and cons various fossil fuel replacements, on a national or international scale. Neither have I been advocating biogas, or biomass. I personally don't buy logs. I've relied, so far on windfalls etc, and our log burner is not our primary source of heat, its for occasional use, when having a cosy night in, in front of the telly, thus my 'primary energy use' involved is very low (I'll admit to using a petrol powered chainsaw to chop a lot of them though).
But you seem to just be saying, in a flippant sort of way, sod it, lets start burning coal again, which I cant agree with.