Keep in mind there are many perceptions derived from this concept; global warming is a natural phenomena that occurs to balance the the global temperature... You have to realize the earth is a hunk of magma that is floating in space undergoing a life cycle; and in the process is giving off its internal heat to space.
Now all the atmospheric input that occurs on the surface of the earth from all the life forms contributes to the thermodynamic equation... The outcome and occurrence of life produces gasses that also go into the atmosphere and impact the natural state of the earth's cycle.
So,recognizing, life and the earth are a symbiotic relationship one can imagine the need to work in accordance with this concept.
The present state of affairs is a concoction of many impacts so it is important to differentiate when one is trying to resolve what ever ones concern is, one needs to be specific...
Pollution is more a local phenomena and only impacts life not the earth itself.. Now as far as life causing global warming the answer is, it contributes; but it would happen anyway, its the mechanism of cyclic cooling of the earth as a rock in space.
Again the notion of global warming contains a few phenomena that of the physical frame of reference, of the metaphysical frame of reference and of the spirit frame of reference. It is imperative to derive a three dimensional solution that actually meets the mark than to deliberate separate answers that will not provide a balanced correction..