Renowned climate scientist to speak at CWA : CWA : Boulder Daily Camera

By the nature of their research methods, scientists are trained to think of no conclusion as absolute. This way of approaching problems works fine in labs, but when it comes to talk of the possible consequences of climate change, some argue that all the probabilities, percentage-chances and possibilities peppered into scientific speech can dull the message of climate change.

"My testimony two decades ago was greeted with skepticism," Hansen wrote last year. "But while skepticism is the lifeblood of science, it can confuse the public. As scientists examine a topic from all perspectives, it may appear that nothing is known with confidence."

Hansen has argued that advocating for something to be done about global warming is a climate scientist's moral responsibility, and he has repeatedly spoken out despite his claims that the government attempted to censor him.

"In my more than three decades in government, I have never seen anything approaching the degree to which information flow from scientists to the public has been screened and controlled as it is now," Hansen said publicly in 2004.

According to the graph here, in 2004, Hansen was only quoted about 5,500 times in news stories