This is an interesting concept, but there
is a problem with it:
Suppose I do some action (a) - this action has a positive effect pos(a) and a negative effect neg(a) such that pos(a) > neg(a). If value can be expressed as the difference between those two (eg. value(a)=pos(a)-neg(a)) then we could matematically prove that this action increase the total value of all actions compared to doing nothing.
Now suppose I where to make and sell a cheap car (eg sell it new for $1000) I would have produced something whose value. However if I where to make billions of these I would have (indirectly) caused considerable polution.
This I guess is the point the theory comes too - but I fails to account for the fact that someone could do find a way to clean up this polution while providing a value to the world (ie a more clean environment). While his action might have a small negative side too, it would be less than his positive, which is less than my negative, or to put it more mathematically: neg(his)<pos(his)<neg(a).
This would still ruin the theory because it is easy to see that we now have more total value than we had at any other time: I made a lot of value to the world, but so did he. While it is true that his actions would not have been needed had I not done mine we would also have lost the benefit of my actions.
Now if we where to continue merly mitigating the original problems, it is true that we would have a max value (after an unlimited time with an unlimited series of actions we would have solved all of the problems and thus the combined value would at most be equal to neg(a)).
However there is nothing to prevent someone from comming up with a solution that gives more benefit than neg(a) - this could be accomplished in several different ways - maybe someone comes up with a cheap fuel that doesnt pollute and use it both on the cars and airplains - thereby generating even more value than neg(a).
You could continue this with and expand it to an infinit series, but for as long as your action has a value > 0, you increase the total value - and afther an infinite amount of actions you have and infinit amount of value rather than atmost neg(a).