Climate Deniers are going to court for defamation against Climate Scientists.

Finally, the courts get to hear a case where climate scientists are being defamed with little or no cause other than the Koch Brothers and their ilk will pay people to spew lies and distortions so they can make 100 Billion as with Keystone.

Accusing a scientist of conducting his research fraudulently, manipulating his data to achieve a predetermined or political outcome, or purposefully distorting the scientific truth are factual allegations. They go to the heart of scientific integrity. They can be proven true or false. If false, they are defamatory. If made with actual malice, they are actionable.
http://crooksandliars.com/2014/01/right-wingers-hot-water-over-defamation