This is true. But it might go faster than you think. I have, as I suggested earlier, asked Randall. We'll see if he picks it up.
It'd be interesting indeed. Yet all plants suddenly disappearing is quite a extreme hypothesis. I don't worry about it happening any time soon. So I don't worry about the levels of oxygen in the atmosphere. To me, it is
abundant and it will likely stay so for a long time. I can breathe it without stealing anyone.
Just because "you" don't pay the cost, doesn't mean it's not a cost.
If my robot does the work with the energy it gets from the sun, to me there is no cost. There is the price I paid for the robot (and again the robot might have been built by another robot, we talked about it), but this has been paid already. The aditional value is
free (zero marginal cost).
Not particularly. At least not in any space with decent ventilation. But in a sealed room, you bet your balls I would worry.
You can, locally, turn any normally abundant resource into a scarce resource. Nothing fancy about this. It happens in some particular situation. Water in a desert, oxygen in a spaceship, and so on. That does not mean you can say that the concerned substance is a scarce substance
per se. It has been made so by a very particular situation. In a sealed room, I also would worry if you're with me breathing some air. But that doesn't tell you anything about the scarcity of oxygen on earth.
