The science around climate change is well established--it's happening, it's man-made, and it will continue--but it's a bit more complicated than that. The physics suggests a relatively small increase in temperature (<1C); it's the positive feedbacks, particularly water vapor vapor feedbacks, that make climate change so potentially costly.
I think being "all over the place" is what skeptics and "denialists" have a problem with. Let's get more data before making drastic changes to our regulations that may hurt hard-working people.