I don’t agree that there are absolute resource restrictions. Matter doesn’t become a resource unless it’s economically useful. 5 kilotons of cadmium may or not

I don’t agree that there are absolute resource restrictions. Matter doesn’t become a resource unless it’s economically useful. 5 kilotons of cadmium may or not be a resource depending on your business. The world is full of ex resources we haven’t exhausted. There’s no shortage of bat guano or saltpeter. Mercury used to be vital, now it’s value is usually negative. There’s plenty of raw matter that’s useless now that will he extremely valuable in the future. And will eventually have awkward afterlife as an ex-resource. Like bat guano.