The climate change denial machine has been described as a beast, like the mythical hydra. The following video describes the beast and how it is funded, based on a paper by Robert Brulle of Drexel University.
While this is a USA senator and the context is mostly American, it is applicable here. Just change the names of some of the players to Gina Rinehart, the IPA etc. Some of our “scientists” are however directly paid by American thinktanks and are often trotted out by deniers e.g. Bob Carter.
The charts shown by the good Senator are here. Anyone who says that ExxonMobil and Koch are no longer funding climate change denial is speaking rubbish.
To read the Brulle paper in full, a PDF is available here.