A study estimates the value of ecosystem services at around 140 trillion dollars a year.

It would have been around 165 trillion if not for the degradation of various systems since 1997.

These figures shouldn't be pressed too far. We can't afford to dispense with a trillion dollars in ecosystem services even if it would gain 2 trillion in production of something. If we lost all the world's ecosystem services, we could not replace them, we would just die.