While climate denialism impedes policymaking in both the US and Australia, there are key differences in their political and public cultures.
The undermining of environmental science, and the creation of lies and bribes to distort public policymaking, is as old as industries that know their products do harm, but lie to keep them in use.
The global food system has been operating in post-truth mode for decades.
Pundits have been keen to link post-truth to post-modernists, post-positivists or any other 'postie'. They should turn their energy to forming a real popular front against Trump's faux populism.
Beneath simple labels like post-truth, alternative facts and fake news is a complex set of issues. Any debate about the problems needs to start from some common points of reference.