If he keeps on polluting the air, a day will come when breathing will become difficult. This is understandable.
We are unique among animal species in that we survive and reproduce in a wide variety of environments through cultural adaptations. The sharp rise in the price of crude oil in is a sure sign of depleting resources and rising demand.
This is the root cause of the modern environmental crisis.
The conditions prevailing on the earth are suitable for our comfortable living. This has created situation where the resources may not last long. Human beings are the ultimate embodiment of this destructive potential on the planet.