How do you price the death of the world?

Climate change is hard to account for.

Grist's David Roberts writes about the distinction between climate change and other environmental problems:

The first difference is that carbon dioxide is not like other pollutants… The typical climate-policy targets that get thrown around — reducing emission rates by 80 percent by 2050, for example — are relatively meaningless. They focus on the rate of flow from the faucet. But that’s not what matters. What matters is the amount in the tub. If the tub fills up enough, global average temperature will rise more than 2 degrees Celsius and we’ll be in trouble. Avoiding that — staying within our “carbon budget” — is the name of the game.

The second difference is that climate change is irreversible.

Roberts cites a 2009 paper from Nature, "among many others":

The climate change that takes place due to increases in carbon dioxide concentration is largely irreversible for 1,000 years after emissions stop. Following cessation of emissions, removal of atmospheric carbon dioxide decreases radiative forcing, but is largely compensated by slower loss of heat to the ocean, so that atmospheric temperatures do not drop significantly for at least 1,000 years.

Climate change is notoriously tricky to deal with in standard economic terms. Part of it is that, to any normal person, something which is irreversible for 1,000 years sounds at least ten times worse than something which is irreversible for 100 years, if not even worse still.

Economically, though, the two are essentially the same. "Present value" is an economic concept dealing with the fact that money in the future is worth less than money now – because you can always invest money now and have more money in the future. Of course, that assumes long-term growth, which, if we're talking about world-changing events like anthropogenic climate change, might not be a safe assumption.

But the end result of the calculations is that nearly any cost beyond a hundred years into the future isn't worth spending money today to avoid. The intuitive conclusion – that it's worth fighting climate change harder if it will last for a millennium than a century – isn't the case. Assuming growth.

But there are even bigger problems for climate change than that. The vast majority of economic responses to it require calculating a "likely cost", and then applying that to the measures proposed to combat it. So, for example, a properly implemented carbon tax requires a calculation of the damage one tonne of CO2 does to the environment, in order to accurately price in the negative externalities.

Unfortunately, conventional ways of pricing risk rather fall over when considering something like climate change, because it carries a non-zero risk of existential threat. That is, there are proposed mechanisms whereby "runaway climate change" could present a civilisation-ending threat.

How do you price the end of civilisation? One option is to look at the value of everything in the world. It would be quite an accounting task, and one faced by the UK government last year when they had to put a price on Stonehenge to fulfil new bookkeeping requirements. The American government puts the value of the entirety of the US at $110trn, so it seems likely that the value of all the world's civilisations is well into 16 figures.

That's high, but it's countable. The real issue comes when you look at an alternative way of measuring the cost of risk, which is the amount you would pay to prevent it. Presumably, there is no sum which would not be worth spending to prevent the end of civilisation. Any cost would be less than the destruction of everything.

By that measure, then, the damage caused by an existential threat is infinite. But the problem with infinite quantities is that they don't work very well in conventional mathematics. Back to the normal risk accounting: you typically multiply the damage you are risking with the chance it will happen. So we are happy to suffer high risk of low damage – like groping for a glass of water at midnight with the lights off – or low risk of high damage – like driving a car – but not high risk of high damage – like driving a car at midnight with the lights off.

But infinity multiplied by anything other than zero is still infinity. Conventional risk assessment simply falls apart when confronted with something the magnitude of the worst possibilities of climate change.

Note too that it doesn't require the risk to be large. I think the risks of climate change are greater than most, but I also think it's extraordinarily unlikely that it actually would result in the end of civilisation. But can we rule it out with certainty?

The best way to look at it is to compare it to our every day lives. Thousands of people are killed crossing the road every day. To do so carries a non-negligible personal existential threat – that is, you might die. Yet I see people dodging traffic to get to work 30 seconds earlier every day, which suggests that, instinctively, we don't treat the risk of death with as much weight as we perhaps should.

But I think theres a different motivator at work. We know death is bad, and that it's worth doing a lot to try and avoid it; but we also know death can come from any corner. And the same is true of fighting existential threats to civilisation. If we could spend ludicrous sums to eliminate them all, it might be worth it; but who's to say we won't prevent climate change, only to die from an asteroid hit? Or cap our future development by not experimenting with nanotech, only for an angry AI to kill us in our sleep?

Climate change could be very, very bad indeed. But making the important choices about the trade-offs we should make to fight it are hard because, not despite, its seriousness.

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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The decline of the north's sporting powerhouse

Yorkshire historically acted as a counterweight to the dominance of southern elites, in sport as in politics and culture. Now, things are different.

On a drive between Sheffield and Barnsley, I spotted a striking painting of the Kes poster. Billy Casper’s two-fingered salute covered the wall of a once-popular pub that is now boarded up.

It is almost 50 years since the late Barry Hines wrote A Kestrel for a Knave, the novel that inspired Ken Loach’s 1969 film, and it seems that the defiant, us-against-the-world, stick-it-to-the-man Yorkshireness he commemorated still resonates here. Almost two-thirds of the people of south Yorkshire voted to leave the EU, flicking two fingers up at what they saw as a London-based establishment, detached from life beyond the capital.

But whatever happened to Billy the unlikely lad, and the myriad other northern characters who were once the stars of stage and screen? Like the pitheads that dominated Casper’s tightly knit neighbourhood, they have disappeared from the landscape. The rot set in during the 1980s, when industries were destroyed and communities collapsed, a point eloquently made in Melvyn Bragg’s excellent radio series The Matter of the North.

Yorkshire historically acted as a counterweight to the dominance of southern elites, in sport as in politics and culture. Yet today, we rarely get to hear the voices of Barnsley, Sheffield, Doncaster and Rotherham. And the Yorkshire sporting powerhouse is no more – at least, not as we once knew it.

This should be a matter of national concern. The White Rose county is, after all, the home of the world’s oldest registered football club – Sheffield FC, formed in 1857 – and the first English team to win three successive League titles, Huddersfield Town, in the mid-1920s. Hull City are now Yorkshire’s lone representative in the Premier League.

Howard Wilkinson, the manager of Leeds United when they were crowned champions in 1992, the season before the Premier League was founded, lamented the passing of a less money-obsessed era. “My dad worked at Orgreave,” he said, “the scene of Mrs Thatcher’s greatest hour, bless her. You paid for putting an axe through what is a very strong culture of community and joint responsibility.”

The best-known scene in Loach’s film shows a football match in which Mr Sugden, the PE teacher, played by Brian Glover, comically assumes the role of Bobby Charlton. It was played out on the muddy school fields of Barnsley’s run-down Athersley estate. On a visit to his alma mater a few years ago, David Bradley, who played the scrawny 15-year-old Billy, showed me the goalposts that he had swung from as a reluctant goalkeeper. “You can still see the dint in the crossbar,” he said. When I spoke to him recently, Bradley enthused about his lifelong support for Barnsley FC. “But I’ve not been to the ground over the last season and a half,” he said. “I can’t afford it.”

Bradley is not alone. Many long-standing fans have been priced out. Barnsley is only a Championship side, but for their home encounter with Newcastle last October, their fans had to pay £30 for a ticket.

The English game is rooted in the northern, working-class communities that have borne the brunt of austerity over the past six years. The top leagues – like the EU – are perceived to be out of touch and skewed in favour of the moneyed elites.

Bradley, an ardent Remainer, despaired after the Brexit vote. “They did not know what they were doing. But I can understand why. There’s still a lot of neglect, a lot of deprivation in parts of Barnsley. They feel left behind because they have been left behind.”

It is true that there has been a feel-good factor in Yorkshire following the Rio Olympics; if the county were a country, it would have finished 17th in the international medals table. Yet while millions have been invested in “podium-level athletes”, in the team games that are most relevant to the lives of most Yorkshire folk – football, cricket and rugby league – there is a clear division between sport’s elites and its grass roots. While lucrative TV deals have enriched ruling bodies and top clubs, there has been a large decrease in the number of adults playing any sport in the four years since London staged the Games.

According to figures from Sport England, there are now 67,000 fewer people in Yorkshire involved in sport than there were in 2012. In Doncaster, to take a typical post-industrial White Rose town, there has been a 13 per cent drop in participation – compared with a 0.4 per cent decline nationally.

Attendances at rugby league, the region’s “national sport”, are falling. But cricket, in theory, is thriving, with Yorkshire winning the County Championship in 2014 and 2015. Yet Joe Root, the batsman and poster boy for this renaissance, plays far more games for his country than for his county and was rested from Yorkshire’s 2016 title decider against Middlesex.

“Root’s almost not a Yorkshire player nowadays,” said Stuart Rayner, whose book The War of the White Roses chronicles the club’s fortunes between 1968 and 1986. As a fan back then, I frequently watched Geoffrey Boycott and other local stars at Headingley. My favourite was the England bowler Chris Old, a gritty, defiant, unsung anti-hero in the Billy Casper mould.

When Old made his debut, 13 of the 17-strong Yorkshire squad were registered as working-class professionals. Half a century later, three of the five Yorkshiremen selec­ted for the last Ashes series – Root, Jonny Bairstow and Gary Ballance – were privately educated. “The game of cricket now is played in public schools,” Old told me. “Top players are getting huge amounts of money, but the grass-roots game doesn’t seem to have benefited in any way.”

“In ten years’ time you won’t get a Joe Root,” Rayner said. “If you haven’t seen these top Yorkshire cricketers playing in your backyard and you haven’t got Sky, it will be difficult to get the whole cricket bug. So where is the next generation of Roots going to come from?” Or the next generation of Jessica Ennis-Hills? Three years ago, the Sheffield stadium where she trained and first discovered athletics was closed after cuts to local services.

This article first appeared in the 19 January 2017 issue of the New Statesman, The Trump era