Why is it irresponsible to burn trees that died 400 million years ago but okay to burn trees that died 6 months ago?
Because the carbon in coal is currently underground and not going to get into the atmosphere without human intervention, whereas growing trees pulls carbon that is currently in the atmosphere out of it and then burning them re-releases it. One option adds carbon that was not already in the relevant system, the other does not.
But once you put the trees underground, they’re not going to get out without human intervention either…
When you’ve cut down the trees, they’ve “left the system”. What does it matter whether the carbon you add to the system from the outside comes from trees that left the system 6 months ago or ones that left the system 400 million years ago?
Yes, but if you put them underground you do not get the electricity generated. Which is the point of this.
What does it matter whether the carbon you add to the system from the outside comes from trees that left the system 6 months ago or ones that left the system 400 million years ago?
Because our baseline that we want to avoid changing the climate away from too much is a few hundred years ago, not a few hundred million years ago.
I don’t see how you’re not getting this.
Yes, when you burn the trees you get electricity, but you also release as much carbon dioxide per kWh into the atmosphere as if you were to burn coal instead.
The climate does not care about where your carbon emissions come from. All carbon emissions are getting us further away from the holocene climate.
Maybe you’re acting under the assumption that the trees wouldn’t have grown or that they wouldn’t have been cut down to make place for new trees if they hadn’t been planned to be burned. Maybe that is even true under our fucked up capitalist economy. But that is just capitalism being stupid. If it is worth it to cut down trees to capture carbon, then we should fund that without also requiring the trees to be burned so all that progress is undone.
And sure, once the fossil fuel industry lies dead and atmospheric carbon dioxide concentrations are back below 280 ppm, then you can start burning biomass to keep the concentration stable. But that’s a century from now. Before then, either bury the trees or don’t cut them down in the first place.