... gas emissions from car tyres... ... any data about railway sleepers "emissions"???
precisely. I used tyres and sleeprs asI perceived them to be relatively straight-forward for my purposes. Once in place however I began thinking quite seriously about these issues but I can't find any data/info on these subjects.
My current project is a home office in the garden, but it was a trial of sorts as I would seriously consider building something far larger in the future, like a house.
But for that I'd probably look at rubble trenches and such. Donald