Bingo! Until we can absolutely define what the ideal, overall average, earth temperature would be and whether we are currently getting closer to or further from it; how can any sane person argue and campaign for a change in conditions that MIGHT affect some aspect of a multitude of factors thought to be interrelated on determining the world's climate?
Good for whom? A person living in the Congo might want to turn the thermostat down a bit, a person living in Siberia might want to turn it up.