(e/c) In this case the discussion was inefficient because you failed to do even minimal due diligence and try to find the answer to "what deletion discussion" yourself, which you could have trivially done, avoiding a waste of both my time and yours. After e/c, the answer is that this discussion is inefficient because of blind stubborness on your part: you're wrong, and yet incapable of backing off.
As for the A in AGW: read global warming: Global warming is the increase in the average temperature of Earth's near-surface air and oceans since the mid-20th century and its projected continuation.  If you want it to mean something else, you may be looking for climate change.
Perhaps the question should be: what exactly are you hoping to achieve here? You're certainly going to have to actually understand the subject rather better than you are demonstrating if you want to make anything better