Surprise, surprise: Wind turbines do lower carbon emissions

Counter-intuitive thinking is counter-intuitive for a reason.

Climate sceptics have long made the counter-intuitive claim that wind turbines don't actually reduce carbon emissions, but data analysed by the Guardian's environment blog suggests that as well as being counter-intuitive, it's just plain false.

The claim the Guardian's Chris Goodall and Mark Lynas investigated relies on the fact that wind power fluctuates with the weather. As a result, when the windspeed drops, gas power stations have to be spun up to provide electricity instead. It has to be gas, because other low-carbon sources of energy either have the same fluctuations as wind, or, like nuclear power, essentially can't be turned off.

The sceptics argue that the need to rapidly turn on the gas generators means that a type of power station known as a "gas-fired open cycle turbine" (OCGT) has to be used. Their key point is that these turbines, which are capable of being put into use extremely quickly, are less efficient than another type of gas generator, a "combined cycle gas turbine" (CCGT). The need to pick up the slack left by wind power, they say, means that so many of these inefficient turbines are used that carbon emissions actually go up compared to the scenario where all the electricity is generated with the more efficient CCGT type.

The Guardian's blog contains a lot of stats taken straight from the National Grid, all of which confirm the intuitive beliefs: wind power replaces fossil fuels. But for the specific claim that it still results in higher carbon emissions, the operative paragraph is the following:

Their arguments are not borne out by current statistics, however. If the sceptics were right, the recent windy conditions would have seen considerable use of less-efficient OCGT as wind input to the grid ramped up and down. In actual fact, during the entire June-September period, OCGTs and equally dirty oil-fired stations produced less than one hundredth of one percent of all UK electricity. In total they operated for a grand total of just nine half hour periods in the first 19 days of the month – and these periods had nothing to do with changing windspeeds.

In other words, the mechanism the sceptics suggested might be at work isn't. The authors go into greater detail about why that is, as well. In essence, it comes down to the fact that wind power isn't actually all that unpredictable. It comes and goes, but we usually have a good few hours warning about when it's going to die down; and it's spread throughout the country, allowing even more flattening of the peaks and troughs in supply.

The bigger reason for having to suddenly spin up big generators isn't sudden drops in supply, but sudden peaks in demand. Take, for example, a World Cup match, where England have made it through to sudden death penalties. The National Grid know there will be a spike in power consumption the minute the match ends, as people get up to put the kettle on – but they can't know when that spike will be until mere seconds before it actually happens. That sort of load will always be problematic to supply with renewables – but it's not much less problematic to supply with fossil fuel either.

Wind turbines. 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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Harmful gender stereotypes in ads have real impact – so we're challenging them

The ASA must make sure future generations don't recoil at our commercials.

July’s been quite the month for gender in the news. From Jodie Whittaker’s casting in Doctor Who, to trains “so simple even women can drive them”, to how much the Beeb pays its female talent, gender issues have dominated. 

You might think it was an appropriate time for the Advertising Standards Authority (ASA) to launch our own contribution to the debate, Depictions, Perceptions and Harm: a report on gender stereotypes in advertising, the result of more than a year’s careful scrutiny of the evidence base.

Our report makes the case that, while most ads (and the businesses behind them) are getting it right when it comes to avoiding damaging gender stereotypes, the evidence suggests that some could do with reigning it in a little. Specifically, it argues that some ads can contribute to real world harms in the way they portray gender roles and characteristics.

We’re not talking here about ads that show a woman doing the cleaning or a man the DIY. It would be most odd if advertisers couldn’t depict a woman doing the family shop or a man mowing the lawn. Ads cannot be divorced from reality.

What we’re talking about is ads that go significantly further by, for example, suggesting through their content and context that it’s a mum’s sole duty to tidy up after her family, who’ve just trashed the house. Or that an activity or career is inappropriate for a girl because it’s the preserve of men. Or that boys are not “proper” boys if they’re not strong and stoical. Or that men are hopeless at simple parental or household tasks because they’re, well...men.

Advertising is only a small contributor to gender stereotyping, but a contributor it is. And there’s ever greater recognition of the harms that can result from gender stereotyping. Put simply, gender stereotypes can lead us to have a narrower sense of ourselves – how we can behave, who we can be, the opportunities we can take, the decisions we can make. And they can lead other people to have a narrower sense of us too. 

That can affect individuals, whatever their gender. It can affect the economy: we have a shortage of engineers in this country, in part, says the UK’s National Academy of Engineering, because many women don’t see it as a career for them. And it can affect our society as a whole.

Many businesses get this already. A few weeks ago, UN Women and Unilever announced the global launch of Unstereotype Alliance, with some of the world’s biggest companies, including Proctor & Gamble, Mars, Diageo, Facebook and Google signing up. Advertising agencies like JWT and UM have very recently published their own research, further shining the spotlight on gender stereotyping in advertising. 

At the ASA, we see our UK work as a complement to an increasingly global response to the issue. And we’re doing it with broad support from the UK advertising industry: the Committees of Advertising Practice (CAP) – the industry bodies which author the UK Advertising Codes that we administer – have been very closely involved in our work and will now flesh out the standards we need to help advertisers stay on the right side of the line.

Needless to say, our report has attracted a fair amount of comment. And commentators have made some interesting and important arguments. Take my “ads cannot be divorced from reality” point above. Clearly we – the UK advertising regulator - must take into account the way things are, but what should we do if, for example, an ad is reflecting a part of society as it is now, but that part is not fair and equal? 

The ad might simply be mirroring the way things are, but at a time when many people in our society, including through public policy and equality laws, are trying to mould it into something different. If we reign in the more extreme examples, are we being social engineers? Or are we simply taking a small step in redressing the imbalance in a society where the drip, drip, drip of gender stereotyping over many years has, itself, been social engineering. And social engineering which, ironically, has left us with too few engineers.

Read more: Why new rules on gender stereotyping in ads benefit men, too

The report gave news outlets a chance to run plenty of well-known ads from yesteryear. Fairy Liquid, Shake 'n' Vac and some real “even a woman can open it”-type horrors from decades ago. For some, that was an opportunity to make the point that ads really were sexist back then, but everything’s fine on the gender stereotyping front today. That argument shows a real lack of imagination. 

History has not stopped. If we’re looking back at ads of 50 years ago and marvelling at how we thought they were OK back then, despite knowing they were products of their time, won’t our children and grandchildren be doing exactly the same thing in 50 years’ time? What “norms” now will seem antiquated and unpleasant in the future? We think the evidence points to some portrayals of gender roles and characteristics being precisely such norms, excused by some today on the basis that that’s just the way it is.

Our report signals that change is coming. CAP will now work on the standards so we can pin down the rules and official guidance. We don’t want to catch advertisers out, so we and CAP will work hard to provide as much advice and training as we can, so they can get their ads right in the first place. And from next year, we at the ASA will make sure those standards are followed, taking care that our regulation is balanced and wholly respectful of the public’s desire to continue to see creative ads that are relevant, entertaining and informative. 

You won’t see a sea-change in the ads that appear, but we hope to smooth some of the rougher edges. This is a small but important step in making sure modern society is better represented in ads.

Guy Parker is CEO of the ASA