A new report from the CJR seconds an earlier report from The Guardian in the United Kingdom, that substantial millions of dollars are being donated anonymously, and often secretly, to support dissemination of the denialist point of view regarding climate change and global warming. One could also argue that large sums are donated to groups dedicated to getting the word out that the scientific evidence is overwhelming and that action must be taken. As noted in the reports, however, those groups tend to be more transparent. Regardless, advocacy for or against a problem is meaningless if there is firm evidence against your stance. Given the lack of any scientific support for a denialist position, one must therefore wonder about the motives.
A very nice report on the reports can be found in this article from Physics Today.