A second is, How can we measure what people know about climate change independently of who they are? (culturalcognition.net)
But what else do we really know about the climate of the 20th and 21st century? (wattsupwiththat.com)
The case is one of several that pits cities against fossil fuel companies and that turns on what the companies knew about climate science, and when. (insideclimatenews.org)