I’m thinking, for example, of their championing of biofuels – a disastrous idea which not only helped starve the poor by causing a massive hike in global food prices but which has also led to still further devastation of their beloved rainforests. And also of the windfarms with which they plan to carpet the British landscape, in theory to save it from an apocalyptic future envisioned by their highly suspect computer models, in practice to render it ugly and unnatural and damaged almost beyond rescue.

The Hon. Sir Jonathon Espie Porritt, 2nd Baronet – he proposes a two-children limit on families

Or listen to Any Questions and hear it for yourself in the visceral hatred, contempt and shrill self-righteousness in the voice of ecology campaigner Sir Jonathan Porritt (Bart.) as he pours scorn on my suggestion that the Severn Barrage project will cause massive environmental damage to the bird-rich mud flats of the Severn Estuary (not to mention killing off one of Britain’s quirkier national phenomena, the mini-tidal-wave-like Severn Bore).

The £20 billion project, if it ever happens, will produce the same amount of energy as one nuclear power station – but at about eight times the cost. Porritt, naturally, is a huge fan – and seems to have little regard for the unfortunate environmental side-effects.

“Wonderful that James is such an ardent defender of the mud flats. At last he’s found a cause worth defending,” sneers Porritt doing his bravura impersonation of Alan Rickman’s oleaginously evil Professor Snape in the Harry Potter movies.

Elsewhere in the programme, Porritt calls me a “flat earther” and shrieks “Lies. All lies” when I make several perfectly truthful and valid statements questioning the so-called scientific “consensus” regarding Anthropogenic Global Warming. Needless to say, he makes no attempt to answer when I put to him that if, as Al Gore claims in An Inconvenient Truth global warming increases inexorably with higher CO2 emissions then how come, when CO2 emissions have continued to rise in the last 12 years global temperatures have actually fallen. Displaying the grandeur and pomposity you might imagine an-Old-Etonian-baronet turned eco-freak progressive would have striven a little harder to mask, Porritt carries on as if anyone who disagrees with him is scum quite beneath his contempt.

I’d never met Porritt before. I found his zealotry genuinely frightening, not least because – except when the mask slips, as I think it did on occasion during the programme, enabling listeners to make up their own minds as to what a piece of work this man is – he speaks his apocalyptic (and often scientifically dubious) views in a voice of such persuasive, modulated reasonableness. Worse still, he has the ear of our future King.

I didn’t mention this during the programme, because I thought things were already getting pretty mucky, but I do think there’s something a bit scary about a man who publicly advocates, in all seriousness, that couples should limit themselves to having two children only in order to save Mother Gaia from the deleterious influence of loathsome mankind. I come from a large happy family. I  love my little bro and my two little sisters. If we followed Porritt’s fascistic strictures, they wouldn’t now exist.

Was the programme quite as biased towards the liberal-left as I predicted in yesterday’s blog? Well to be fair to Jonathan Dimbleby I believe he tries as hard as he possibly can to be neutral. (As neutral as a man can be when he’s such a believer in AGW that he’s erecting a wind turbine in his Devon garden, much to the fury of some of his neighbours). The audience at beautiful Middle Wallop’s magnificent Museum Of Army Flying (highly recommended, especially for its Arnhem dioramas with Horsa gliders, and Gallipoli, a six-pounder that was actually used in the battle) were generous and pleasant. But I can’t pretend it wasn’t an uphill struggle being the only libertarian right-wing “AGW denier” against a panel of three liberal-lefties.

Even my nice neighbour, novelist Kate Mosse, who was supposed to be at best neutral came out on the deep green leftie side with possibly the most ludicrously stupid remark of the evening. If we put up with electric pylons, she said, we should put up with wind turbines too. And actually, she thought, the windfarms in South West France where she has her second home look rather pretty.

Yes Kate, and I’d bet they’d look even prettier with a makeover by Cath Kidston. Why on earth didn’t we think of this before?

Me. Any Questions. Tonight. Middle Wallop, Hants.

With Any Questions – as on its TV equivalent Question Time, and indeed on any current affairs programme conducted by the incorrigibly liberal-left BBC – the chief victim is always the same: whichever member of the panel of politicians, media commentators and celebrities who comes across as the most right wing.

This is why, when Conservative MPs appear on these programmes they often sound so disappointingly limp. I remember one ghastly Any Questions episode when a Tory MP started backtracking wildly after initially daring to suggest that perhaps council tenants are less inclined to take care of their properties than home owners. This is a self-evident truth. A total no-brainer. Of course ownership makes you more likely to take care of something because financial interest and pride will compel you to do so. But the Tory MP – I forget his name: luckily for the craven berk! – went into squirmsome denial mode as soon as a Labour MP on the panel affected umbrage at this outrageous slur on the famed character and decency of the council tenant class.

Having done Any Questions a couple of times myself, now, I know exactly why these Conservative cowardy-custards behave as they do. No one likes being jeered at and booed by an Any Questions or Question Time audience; everyone likes being clapped. And the problem with Any Questions and Question Time audiences is that you’ll almost never get a clap if you suggest any of the following: Anthropogenic Global Warming is an expensive con; the Israelis are not evil, murdering bastards; the NHS isn’t perfect; we can’t afford unlimited immigration; Islamism represents a major cultural threat to British life, not just a physical one; the European superstate is one massive socialist conspiracy to boss us around and bleed us all dry…. To name but a few.

Perhaps I’ll get a slightly better night tonight in Middle Wallop than I did in the slow-motion train-wreck that was my first Any Questions a few years back in Hay On Wye’s literary festival, where I was all but beaten to death with rolled up copies of the Independent and the Guardian. I chose Middle Wallop because, being on the edge of Hampshire and near Wiltshire, in country where I have sometimes gone foxhunting, and where there are numerous retired colonels and military bases, it’s ever so slightly less likely to have an audience stuffed with rabid pinkos.

But you’re never really safe with the BBC. (An organisation for which, in a weird, masochistic way, I have a powerful love: even for quintessentially lefty programmes like Today). I quite believe them when they say their studio audiences are not pre-selected in any way on political grounds. It may just be one of those facts of life that while left-liberal types are drawn to spending their Friday nights in theatres, town halls (or in tonight’s case The Museum of Army Flying) listening to people like me burbling on about current affairs, conservative types prefer to play bridge, or watch TV, or snort cocaine from silver trays balanced on the heads of dwarves.

I can’t say it makes it any less nerve-wracking, though, going on to these shows and knowing that your job, as the token right-winger on the panel, is to be eaten alive by the studio audience. It’s one of those few occasions in my life where I wish could be the kind of tiresome, faux-lovable lefties that will always get an easy ride on these programmes. Tony Benn, say. Even, heaven forfend, Michael Moore.