And even if it was waste, that you are planning to build megastructures with it makes it no longer waste very quickly, and as there was no demand for the product before and now it is in high demand, the price will prob do some very interesting things. A suggestion was made to use sugarcane bagasse which has no other use it seems. But that would then also quickly get a use and increase in price, which would also do things to the price of replacement products, like sawdust, or straw. And I assume that if the price of straw in the world rises a lot due to this megaconstruction a lot of farmers would be unhappy, but yeah fuck the poor countries.