AIRPORT PROTESTORS CALL "CLIMATE EXPERT" AS WITNESS

In a case very similar to the Kingsnorth Power Station case, this article explains how the jury are being given lectures in climate change, presumably so that the defendants can claim that their actions were necessary. So the madness continues. What I cannot understand is why the prosecution do not bring in some "experts" to refute this "evidence". I expect the reason is that no one wants to be seen to be "off message".