If you're under 45, you'll see climate change's effects in person

We're still caught up in a 1980s mindset.

BusinessGreen's James Murray writes about "Clinging to a climate of optimism" when it comes to fighting climate change:

My point is this: if you are over 45, then you are on track to bequeath the rest of us a pretty scary inheritance. But if you are under 45, then you have a good chance of experiencing some of the more devastating results of our failure to leave fossil fuels in the ground for yourself. You will see first-hand whether we are capable of building a genuinely sustainable global economy by mid-century or not. You will find out if it is possible to support nine billion people in a warmer world. You have a direct stake in this game.

In a way, it comes back to the argument I made last week about the risks of imprecision: climate change has been mentally filed away in the "legacy to our grandchildren" box for the last forty years. But while it's painfully obvious that something happening "in 2080" is getting closer every year, it's not quite so easy to continually readjust your perceptions for something which you've estimated as "a long way in the future".

And so we end up in the trap Murray addresses, where even people who were born after climate change first hit the agenda have it wrongly pegged as something they won't be alive to see. There's a level of urgency which people understand on an intellectual level, but not on a practical one. That is, someone perfectly happy to talk about "two degrees warming by 2050" still blanches when discussing the Thames Barrier being breached in their lifetime.

What effects could that practical understanding have on our approach to the issue? Murray writes:

Too many environmental debates are akin to arguing in 1940 about whether the allies should build tanks or planes.

We are past the point where we have the luxury of working out what the "best" sort of investment is to fight climate change – and really, we should never have been having that argument in the first place. A carbon-free energy infrastructure would always have a mix of inputs, from wind and solar to nuclear and CCS-equipped gas generation, and while some mixes might work better than others, all of them are better than the status quo.

But you don't even need to decide which energy mix you want, because with an appropriate policy background you could leave providers to make their own choices. That could be a cap-and-trade system which actually caps, as opposed to just trading, or it could be a carbon tax levied at a high enough level to make a difference, but whatever it is, it needs to be passed sooner rather than later.

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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David Cameron’s speech: a hymn to liberalism from a liberated PM

The Prime Minister spoke with the confidence of a man who finally has a full mandate for his approach. 

At every one of his previous nine Conservative conference speeches, David Cameron has had to confront the doubters. Those Tories who rejected his modernisation of the party from the start. Those who judged it to have failed when he fell short of a majority in 2010. Those, including many in his own party, who doubted that he could improve on this performance in 2015. Today, rather than confronting the doubters, he was able to greet the grateful. As the first majority Conservative prime minister for 18 years, he rightly savoured his moment. "Why did all the pollsters and pundits get it so wrong?" he asked. "Because, fundamentally, they didn't understand the people who make up our country. The vast majority of people aren't obsessives, arguing at the extremes of the debate. Let me put it as simply as I can: Britain and Twitter are not the same thing." Labour should pin that line to its profile. 

With a full mandate for his approach, Cameron went on to deliver his most unashamedly liberal speech to date. Early on in his address, he spoke with pride of how "social justice, equality for gay people, tackling climate change, and helping the world's poorest" were now "at the centre of the Conservative Party's mission". A lengthy section on diversity, lamenting how "people with white-sounding names are nearly twice as likely to get call backs for jobs than people with ethnic-sounding names", was greeted with a standing ovation. Proof, if needed, of how Cameron has changed his party beyond recognition. The former special adviser to Michael Howard, who avowed that "prison works", told his audience that prison too often did not. "The system is still not working ... We have got to get away from the sterile lock-em-up or let-em-out debate, and get smart about this." From now on, he declared, the system, would "treat their [prisoners'] problems, educate them, put them to work." 

There were, of course, oversights and lacuna. Cameron reaffirmed his commitment to a budget surplus but glossed over the unprecedented, and many believe undeliverable, that will be required to achieve it (and which may fail to do so). He hailed the new "national living wage" with no mention of the tax credit cuts that will leave the same "strivers" worse off. His "affordable" starter homes will be unaffordable for average-earning families in 58 per cent of local areas. But it is a mark of Cameron's political abilities that it was easy to forget much of this as he spoke. Like George Osborne, he deftly appropriated the language of the left ("social justice", "opportunity", "diversity", "equality") to describe the policies of the right. Cameron is on a mission to claim ownership of almost every concept associated with Labour. The opposition should not sleep easily as he does so. 

There was little mention of Labour in the speech, and no mention of Jeremy Corbyn by name. But when the attack came, it was ruthlessly delivered. "Thousands of words have been delivered about the new Labour leader. But you only really need to know one thing: he thinks the death of Osama bin Laden was a 'tragedy'". The description of Corbyn as the "new Labour leader" shows the Tories' ambition to permanently contaminate the party, rather than merely the man.

There are plenty of potential landmines ahead for Cameron. The comically lukewarm applause for his defence of EU membership was a reminder of how divided his party is on this issue. But today, he spoke as a man liberated. Liberated by winning a majority. Liberated by not having to fight an election again. Like a second-term US president, he was able to speak of how he was entering "the second half of my time in this job". Tributes to Osborne (the "Iron Chancellor) and Boris Johnson (greeted with a remarkable standing ovation) alluded to the contest to come. But whoever succeeds him can be confident of assuming a party in good health - and more at ease with the modern world than many ever thought possible. 

George Eaton is political editor of the New Statesman.