Here’s the source document they claim to be using for the lifecycle emissions data.
I’m unsure why they chose to have a variable length bar for biomass, but chose the global average for solar (while putting in brackets how variable it is).
I can’t find a source for their biomass emissions figures - it doesn’t seem to be in that document, nor is it mentioned in the methodology.
There’s a lot of fraud around the wood pellets used by some biomass-burning power plants. One example is Drax claiming they’re making pellets out of offcuts and sawdust that would otherwise go to landfill (so effectively emitting nothing that wouldn’t have been emitted anyway from decomposition) but really clearcutting pristine rainforest (so emitting carbon, and destroying a carbon sink that would have absorbed more had it been left alone). There’s not really a variable range based on technology like there is for solar. It’s a fixed figure, but because of fraud, there’s no clear way to tell what it is, and different organisations have different estimates.
Here’s the source document they claim to be using for the lifecycle emissions data.
I’m unsure why they chose to have a variable length bar for biomass, but chose the global average for solar (while putting in brackets how variable it is).
I can’t find a source for their biomass emissions figures - it doesn’t seem to be in that document, nor is it mentioned in the methodology.
There’s a lot of fraud around the wood pellets used by some biomass-burning power plants. One example is Drax claiming they’re making pellets out of offcuts and sawdust that would otherwise go to landfill (so effectively emitting nothing that wouldn’t have been emitted anyway from decomposition) but really clearcutting pristine rainforest (so emitting carbon, and destroying a carbon sink that would have absorbed more had it been left alone). There’s not really a variable range based on technology like there is for solar. It’s a fixed figure, but because of fraud, there’s no clear way to tell what it is, and different organisations have different estimates.