National Academy of Science
The National Academy of Sciences is the "Supreme Court" for science. Honest Abe created it 150 years ago to summarize "state of the art" scientific knowledge and advise Congress and the White House. It's been doing this every year since, under every administration.
All scientists are skeptics. The motto of UK's 350-year-old Royal Society is 'Nullius in verba,' Latin for "On the words of no one" or "take nobody's word for it." It is "an expression of its enduring commitment to empirical evidence as the basis of knowledge about the natural world."
“In science, 95 percent certainty is often considered the gold standard for certainty.” - Seth Borenstein Associate Press science writer
"...97–98% of the climate researchers most actively publishing in the field support the tenets of ACC [anthropogenic climate change] outlined by the Intergovernmental Panel on Climate Change..." —Anderegg, Prall, Harold, & Schneider (PNAS, 2010).
‘Scientists are often accused of being alarmists. However, an examination of scientific literature shows that scientists have been underestimating the risks. Instead of being drama queens, climate scientists are like anti-drama kings.‘ – Dr. Katharine Hayhoe, climate scientist and associate professor of political science at Texas Tech University.