A: We will naturally be saddened if our experiment validates the worst fears of global warming proponents, as it will have meant that we inadvertently contributed to the greenhouse gas problem ourselves and accelerated the Armageddon clock by several ticks. However, our sadness will be balanced out by the knowledge we will have gained, and by our success at having resolved this debate conclusively. If global warming really is a problem, then our experiment will have simply armed ourselves with irrefutable evidence to act upon that information. And if it's not a problem, then no harm, no foul.
Further, even if the global warming theory is correct, there are any number of other calamities that could befall the human race and spell our demise as a species. Nuclear war. A mega-pandemic. An asteroid or comet impact. The Christian rapture. Another religion’s predicted end-times. Something else we’re not even capable of foreseeing. In light of all these possible threats, how can we fairly conclude global warming is the most serious one? Or even in the top five?
Ultimately, we remain optimists. We believe humans are capable of solving any problem that is capable of being solved, and the outcome of our experiment won’t threaten that idea at all.