Bio waste is best waste there is because what we need is whatever material we extract from the fields to go back there to fertilise it. Anything that we extract from the soil that isn't going back there is essentially eroding it.
Having a choice to mine more sand or destroy biological material to make buildings, I would prefer to mine more sand and leave the biological material to be available to cycle through the environment.
I have no data about the ecological cost of using spent coffee grounds, but I do suspect collecting, shipping, processing it (pyrolysis!) is going to cost way more than using sand in bulk.
Bio waste is best waste there is because what we need is whatever material we extract from the fields to go back there to fertilise it. Anything that we extract from the soil that isn't going back there is essentially eroding it.
Having a choice to mine more sand or destroy biological material to make buildings, I would prefer to mine more sand and leave the biological material to be available to cycle through the environment.
I have no data about the ecological cost of using spent coffee grounds, but I do suspect collecting, shipping, processing it (pyrolysis!) is going to cost way more than using sand in bulk.