I'd like to stick with just the Genesis-based moral obligation to protect God's Creation (in general) and if I have to mention "Climate" at all, just note that all these hypotheses are controversial, even dubious.
In my area, Genesis is what’s used to promote global warming and government intervention. The argument goes, God commands us to be good stewards of the earth so we must reduce greenhouse gases. AGW is proclaimed a fact confirmed by science.
You are right that the parish bulletin is not the place for debate and letting people know that this is a subject of much debate within climate science is the best way to handle it. I don’t envy you being put into this position with the bulletin. I certainly was more able to handle it in CCD.