A carbon tax may not actually do a whole lot for emissions

There's a chicken/egg problem at work.

A carbon tax is most economists' favourite method of dealing with climate change. It is exactly the sort of simple, market-driven intervention that they tend to like: set a price per tonne of carbon emitted which is equal to the value of the damage that tonne does to the climate, and then sit back and what businesses and consumers react. Some may cut their usage; some may switch to low-carbon sources of energy, which suddenly become cheaper comparatively; and some may choose to just pay the extra cost (what happens in that last situation is debatable – some think the money should just count as general taxation, others that it should be put towards climate change prevention and mitigation).

The Washington Post's Brad Plumer suggests that it may not work as well as we would hope, however. He reports on a recent MIT study looking at the likely effect of a $20 a ton carbon tax in the real world – the value proposed by a pair of MIT researchers last month.

Plumer writes:

Sebastian Rausch and John M. Reilly of the MIT Global Change Institute recently put forward a proposal for a $20/ton carbon tax that would rise 4 percent each year, starting in 2013. (The funds would be used to offset taxes elsewhere.) Here’s what their economic model predicts would happen to U.S. greenhouse-gas emissions:

Blue line: MIT reference case with no carbon tax. Black line: EIA reference. Green line: Scenario with MIT carbon tax in place.

With a carbon tax in place, U.S. greenhouse gas emissions do start declining quite a bit (this is the green line). But by 2030, emission levels stall, even though the carbon tax keeps rising and rising each year. The United States wouldn’t get anywhere near the 80 percent cut by 2050 that the White House has envisioned.

One explanation here is that MIT’s proposed carbon tax just isn’t high enough. But Muro favors another possibility–that a carbon tax alone isn’t enough to drive deep reductions. The private sector tends to under-invest in energy R&D and key bits of infrastructure such as transmission lines. Without further policies, it’s unlikely that we’ll see a sweeping transformation of our energy system to give people alternatives to coal plants and gasoline-powered cars.

This echoes an argument I've heard several times from those on the more technical side of climate change prevention. For all that the economists and politicians like to talk about creating the conditions in which the private sector will be incentivised to help tackle climate change, those who are more keenly aware of the massive costs involved tend to be rather more pessimistic.

They point out that the carbon tax model provides a cash injection to providers of low-carbon energy – but only after the tax is already instituted. As a result, there's another weak link in the chain, which is the ability of those providers to secure loans to build the capacity required. That's possible for massive companies looking to get into a new area; and it's possible for smaller companies, provided they get enough certainty from the government to be able to convince bankers.

But the fear is that larger companies, already strongly embedded in the conventional energy infrastructure, have little incentive to devote money, which could be used to lower the cost of polluting fuels, to instead build new capacity; and smaller companies won't be left with enough time between when the government finally confirms a carbon tax, and when their new generation is actually needed.

At the same time, though, there is growing evidence that some companies really are going above and beyond the call of duty. Some of it may be greenwashing, and some may be token expenditure, but if there really is any sizeable investment in low-carbon infrastructure, then it makes a carbon tax that much more effective.

Carbon taxes can only lower emissions if they raise the price of polluting relative to an alternative. If that alternative isn't available, then they risk being simply another source of revenue for the state.

Wind turbines being prepared. Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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What David Hockney has to tell us about football

Why the sudden glut of blond footballers? A conversation I had with the artist back in 1966 gave me a clue. . .

In 1966, I went to interview David Hockney at a rather run-down flat in Bayswater, central London. He was 28 and had just won a gold medal at the Royal College of Art.

In his lavatory, I noticed a cut-out photograph from a newspaper of Denis Law scoring a goal. I asked if he was a football fan. He said no, he just liked Denis Law’s thighs.

The sub-editors cut that remark out of the story, to save any gossip or legal problems. In 1966 homosexual activity could still be an offence.

Hockney and a friend had recently been in the United States and had been watching an advert on TV that said “Blondes have more fun”. At two o’clock in the morning, slightly drunk, they both went out, bought some hair dye and became blond. Hockney decided to remain blond from then on, though he has naturally dark hair.

Is it true that blonds have more fun? Lionel Messi presumably thinks so, otherwise why has he greeted this brand-new season with that weird blond hair? We look at his face, his figure, his posture and we know it’s him – then we blink, thinking what the heck, does he realise some joker has been pouring stuff on his head?

He has always been such a staid, old-fashioned-looking lad, never messing around with his hair till now. Neymar, beside him, has gone even blonder, but somehow we expect it of him. He had foony hair even before he left Brazil.

Over here, blonds are popping up all over the shop. Most teams now have a born-again blondie. It must take a fortune for Marouane Fellaini of Man United to brighten up his hair, as he has so much. But it’s already fading. Cheapskate.

Mesut Özil of Arsenal held back, not going the full head, just bits of it, which I suspect is a clue to his wavering, hesitant personality. His colleague Aaron Ramsey has almost the full blond monty. Paul Pogba of Man United has a sort of blond streak, more like a marker pen than a makeover. His colleague Phil Jones has appeared blond, but he seems to have disappeared from the team sheet. Samir Nasri of Man City went startlingly blond, but is on loan to Seville, so we’re not able to enjoy his locks. And Didier Ndong of Sunderland is a striking blond, thanks to gallons of bleach.

Remember the Romanians in the 1998 World Cup? They suddenly appeared blond, every one of them. God, that was brilliant. One of my all-time best World Cup moments, and I was at Wembley in 1966.

So, why do they do it? Well, Hockney was right, in a sense. Not to have more fun – meaning more sex – because top footballers are more than well supplied, but because their normal working lives are on the whole devoid of fun.

They can’t stuff their faces with fast food, drink themselves stupid, stay up all night, take a few silly pills – which is what many of our healthy 25-year-old lads consider a reasonably fun evening. Nor can they spend all their millions on fun hols, such as skiing in the winter, a safari in the spring, or hang-gliding at the weekend. Prem players have to be so boringly sensible these days, or their foreign managers will be screaming at them in their funny foreign accents.

While not on the pitch, or training, which takes up only a few hours a day, the boredom is appalling, endlessly on planes or coaches or in some hotel that could be anywhere.

The only bright spot in the long days is to look in the mirror and think: “Hmm, I wonder what highlights would look like? I’ve done the beard and the tattoos. Now let’s go for blond. Wow, gorgeous.”

They influence each other, being simple souls, so when one dyes his hair, depending on where he is in the macho pecking order, others follow. They put in the day by looking at themselves. Harmless fun. Bless ’em.

But I expect all the faux blonds to have gone by Christmas. Along with Mourinho. I said that to myself the moment he arrived in Manchester, smirking away. Pep will see him off. OK then, let’s say Easter at the latest . . . 

Hunter Davies is a journalist, broadcaster and profilic author perhaps best known for writing about the Beatles. He is an ardent Tottenham fan and writes a regular column on football for the New Statesman.

This article first appeared in the 22 September 2016 issue of the New Statesman, The New Times