If the EU subsidises agroforestry (not instead of forest) so that many more farmers practice agroforestry, how much profit would it make?

How much profit would she then have in revenue from energy wood and the bioethanol, wood gas or coal that might be produced from it, and how much loss would she have because of the subsidies and possibly because of the slower growing arable plants or meadows, and how much profit would she have because…

What about toilets where the feces and urine are taken out? How about turning the waste into biogas and using the phosphorus from the leftovers as fertilizer?

Would that be good and what can the government do to make it happen? I've heard that after the garbage has been stored there are hardly any microorganisms left. https://m.bild.de/ratgeber/2010/biogas/scheiss-idee-oder-super-erdung-heiz-aus-toiletten-14221524.bildMobile.html?t_ref=https%3A%2F%2Fwww.google.com%2F If only we did it everywhere

Did you know of such small biogas plants?

Maybe not bad considering our gas prices. https://stromee.de/blog/nachhaltig/igen_biogas_erzeug_Minibioagasanlage_garten If you have a garden you can fertilize it and be partly self-sufficient in terms of food. I want to grow trees and shade plants, like a nutrient forest. The Lara variety of walnuts is not large, fits in the garden and is productive

What if you take the parts of the corn plant other than what humans can eat and first use them to grow mushrooms, and then turn the leftovers into biogas?

Food is more important than biogas, but biogas should not be converted into electricity because some of it is wasted, either in the car or in the heating system.

How many kg of starch, protein and fiber can you make from one kg of cellulose using mushrooms?

For example, from straw or wood. I think that since mushrooms do not move and burn few calories, you can make 1 kg of mushroom dry mass from 1 kg of wood. It could be that methane is produced but there is less mushroom yield as a result, I can imagine that. But I thought…