Many who believe that we must act quickly to avoid major problems from man-made global warming largely base their arguments on the predictions of computer-generated models. But are these models trustworthy? Well according to a major study in the Journal of Geophysical Research, these climate models still have a number of serious problems, and may not even be improving with time. Amazingly, one portion of the study found that using more realistic simulations of the ocean actually led to worse temperature projections than when less realistic ocean data was used. It’s little wonder then that scientific debate continues to rage over this little understood matter of climate change.