Scientific consensus proves nothing. Scientists have shown this over and over again, with theories accepted by the group think, that turn out false. Semmelweis is one tragic example.
I think this is a bad example. I had to look it up, by the way. Semmelweis is the guy who discovered that doctors could reduce "childbed fever" mortality significantly by washing your hands with chlorine (a disinfectant).
In addition, I offer this definition from Wikipedia:
The Semmelweis reflex or "Semmelweis effect" is a metaphor for the reflex-like rejection of new knowledge because it contradicts entrenched norms, beliefs or paradigms.
What percentage of doctors today agree with Semmelweis and his decision to disinfect? At some point, perhaps 20-40 years ago, some crazy climatologist looked at his data and said, "You know what...I think humans are contributing to global warming." And his colleagues said nonsense, that can't be true. But now 97% of his colleagues agree.
Name any scientific discovery, where the scientific community eventually reached a near consensus opinion, that did not turn out to be true.
The world is a sphere, evolution is real, and there's a direct link between cigarette smoking and lung cancer. If the smoking-cancer link was discovered in today's world, I can imagine the exact same thing happening. Tobacco companies pay to have contrarian opinions drafted by credentialed science types, then pay to have to the information disseminated widely, creating doubt and uncertainty among the people. Politicians then use the wedge issue to outrage and polarize the people.
C'mon, can't you see Glenn Beck or Sean Hannity railing against the liberal media, and the freedom haters for attacking the tobacco companies?
Back to my original point. I guess it's a matter of who you trust. I trust the people who are trained and paid to study the subject. I also trust the energy companies and the politicians they support to try and confuse the public. Good grief this is such a no-brainer. The world has gone mad.
Now I will follow Mr. Birkert into the kitchen. Hey Garland, you want a sandwich or something?