What is the consensus, mid-range model projection in the IPCC report on climate chance by the turn of the century? Using the rather strong assumption that greenhouse gas emissions will accelerate throughout the century, they conclude that a temperature increase of 3 degrees Celsius is the best prediction. This is the scientific consensus. You previously stated that there was good money to be made on cleaner operations that reduce greenhouse emissions, and, since making good money always makes good business sense, I assume you believe that there will be some market-based reductions in greenhouse gas emissions over the course of the next century, which would abate this assumed acceleration. However, for the sake of argument, let's grant the assumption that emissions will accelerate, leaving the prevailing scientific opinion at an increase of 3 degrees.
The previously-cited article assumes an increase of 2.5 degrees. You previously asserted that if this were the case, you would be all in favor of the increase. Assuming that you are a man (or woman) of your word, and that we can take your assertions to represent your beliefs, this leaves three possibilities:
(1. You believe the scientific consensus to be inaccurate. Since this runs counter to many of your previous claims, I consider it unlikely.
(2. You believe the half-degree difference is so significant that it would chance a moderate overall benefit (which you previously agreed to) to a global catastrophe. If so, this might be because you have access to far better computer models than those used by the world's foremost climatologists, who concede that these predictions have a wide range of uncertainty. Very few scientists would be willing to wager that any particular half-degree difference would be the difference between benefit and catastrophe. Again, given your faith in the prevailing attitudes of the scientific community, one tends to believe you'd shy away from this possibility.
(3. We are now in perfect agreement. Given the aforementioned unlikelihood of you deciding for possibilities (1. or (2., it seems likely that we may have at last resolved our dispute. It's been a pleasure.