There is good reason to take the work of these scientists seriously. Nevertheless, if history is any indication these warnings by our best and brightest will be ignored and nothing -- or at best nothing that will effective -- will be done by our species to prevent what is likely to happen to our detriment for thousands of years to come.An interdisciplinary group of 22 scientists, combining paleontological evidence with ecological modeling, has concluded that the earth appears headed toward catastrophic and irreversible environmental changes.
Their report, in the June 7 issue of the journal Nature, describes an exponentially increasing rate of species extinctions, extreme climate fluctuations, and other threats that together risk a level of upheaval not seen since the large-scale extinctions 65 million years ago that killed off the dinosaurs. [source]
I submit that the notion that human beings are an intelligent species is suspect, and with little merit. Most importantly while a few of us have sufficient intelligence to create quite wonderful technologies and harness extraordinary energies, most of us lack sufficient intelligence to use these wonders in such as a way as not to doom if not our species, certainly our civilization.