James Randerson writes at the Guardian:
Watermelon is a word that tells you what is wrong with the climate change debate.
For some libertarians, it is the insult that expresses what greenies and climate scientists are really up to. Behind all the acronyms and the jargon, they say, is a conspiracy to promote a nakedly political aim – anti-big business; anti-free market; pro-tax increases. In short, green on the outside but red on the inside.
The full conspiracy theory requires an impressive degree of paranoia, but one of the reasons the jibe is so persistent is that, if we’re honest, there is a grain of truth to it – at least among some in the green movement and on the left.