Well, I do believe that the whole 'global warming' thing is absolutely part and parcel to the overall cycle of the earth's "life". I have no doubts about that. But I also think that we don't have any idea what, exactly, our own behavior (i.e., our 'waste') can and will do to make it worse (or better?) for us. We don't have records dating back that far, we don't know if the previous ice age was strictly an organic, natural part of earth's stages, or if perhaps the uber-advanced society of Atlanteans perhaps contributed to making it worse -- or even caused it completely.
Lotsa questions, lol.