There’s a short video on the Building website of Phil Clark and Michael Willoughby discussing biomass. At one point Michael claims “it’s not efficient to transport biomass more than 20 miles.” Holy smokes, where does this fact come from? I took a stab at the numbers and came up with a figure of 3000km (1900 miles) by truck before you lose the carbon benefit. That’s 100 times more than Michael’s figure. Looks like one of us (or possibly both) has got it wrong.