If climate change is dangerous, can’t a scientist say so? (Hansen’s keynote address at the AGU 2013)

Back in l988, physicist/climatologist James Hansen told Congress that that we had begun to change the earth's atmosphere. This was during a heat wave in Washington, and his testimony made headlines. That's rare for a scientist of any sort.  "Global warming has began, Expert tells Senate" reported the NYTimes.  "It's time to stop waffling soContinue reading “If climate change is dangerous, can’t a scientist say so? (Hansen’s keynote address at the AGU 2013)”