One organization that won't be attending this weekend's "March for Science" is the Cornwall Alliance for the Stewardship of Creation.

Beisner

"If there were a real march for science, we might very well be glad to participate in it," says Cornwall founder and national spokesman Cal Beisner. "A real march for science would tell us for instance that sound science can lead to good environmental stewardship, and it would tell us that there's a difference between rational, evidence-driven science and most of the science that lies behind environmentalism's scare-mongering."

Beisner also says a real march for science would explain that real science "doesn't work by consensus, intimidation, data manipulation or personal attack" – but instead "by painstakingly comparing theories and predictions with real-world observations."

What about the repeated statements that 97 percent of scientists agree on "climate change"?

"Scientific consensus gets overturned all the time," he responds, "but the reality is that the notion that 97 percent of scientists agree that global warming is real and dangerous and all of that, is built on terrible confusions, terrible equivocations."

Beisner adds that, beyond that, there's huge debate over whether man-made CO2 emissions have been the primary driver or a very small bit player in it; over whether the amount of warming coming from emissions of greenhouse gases is going to be dangerous or benign or perhaps even beneficial; and over whether even if it's dangerous enough to justify spending trillions of dollars to try to reduce that warming.