Bill Gates on nuclear power

Bill Gates has brushed up against climate issues before. First, he apparently considered investing in the oil sands. Later, he invested $4.5 million of his own money in geoengineering research.

Most recently, he gave a talk at the TED conference advocating that developed countries and China cut greenhouse gas emissions to zero by 2050 (producing an 80% overall reduction), and do so largely on the basis of nuclear power. He thinks fast breeder reactors capable of using U-238 are the way forward, given how much more fuel would be available. His favoured version of breeder reactor is the traveling wave reactor, which is theoretically capable of using little or no enriched uranium.

Emissions equation

Gates argues that the key equation is: (population) X (services) X (energy use for services) X (greenhouse gas intensity of energy). To get down to zero, one of these elements needs to be reduced to that level. He argues that more services are important, especially for the world’s poor. Efficiency, he argues, can be improved quite substantially – perhaps increased three to sixfold, overall. The real work, he argues, needs to be done by cutting the GHG emissions associated with energy production to near zero.

Energy options

Gates argues that the energy systems of the future will need massive scale and high reliability. He singles out five he sees as especially promising, though with significant challenges:

  • Carbon capture and storage (CCS) – hampered by cost, access to suitable sites for injection, and long-term stability of stored gases (the toughest part)
  • Nuclear – with its cost, safety, proliferation, and waste issues
  • Wind
  • Solar photovoltaic
  • Solar thermal – all three limited by land use, cost, transmission requirements, and the need for energy storage to modulate fluctuations in output

Four others he describes as potentially able to make a contribution but decidedly secondary in importance:

  • Tide
  • Geothermal
  • Biomass
  • Fusion

I agree that fusion is a long shot that we cannot count on. I am more optimistic than Gates about the other three. Pumped tidal power could provide some of the energy storage he sees as so important. Enhanced geothermal looks like it has a lot of promise. Finally, combined with CCS, burning biomass offers us a mechanism to actually draw carbon dioxide out of the atmosphere and bury it.

The big picture

Cutting from the world’s current global emissions of about 26 billion tonnes (gigatonnes) of CO2 down to zero will require enormous activity. Quite possibly, nuclear will need to be part of that, despite its many flaws. That said, we need to be hedging all of our bets. One big accident could put people off nuclear, or fast breeder designs could continue to prove impractical. We need to be deploying options like huge concentrating solar farms in deserts and massive wind installations at the same time.

It is also worth noting that Gates’ assumptions about the rate at which emissions must be reduced are more lenient than those like James Hansen who are more concerned about when massive positive feedbacks will be kicked off. If the people who say we need to stabilize at 350 ppm are correct, Gates’ prescription of a 20% cut by 2020 and an 80% cut by 2050 will be inadequate to prevent catastrophic or runaway climate change.

Gates talks about this a bit during the questions. There are two risks: that his assumptions about the speed with which emissions must be cut are too lenient, or that his beliefs about the pace of technological development and deployment are overly optimistic. He thinks geoengineering could “buy us twenty or thirty years to get our act together.” Here’s hoping we never have to test whether that view is accurate.

Xyloexplosive devices

The funniest videos to watch backwards are those in which entropy increases a lot: things like explosions and toppling dominoes, where it is completely obvious that the order of the video frames has been reversed. By contrast, something like a bouncing ball is pretty boring to watch backwards.

Tom Stoppard’s play Arcadia features some good discussion of entropy, and reactions that cannot be reversed. It is easy enough to stir jam into pudding, but impossible to unstir it back out. In addition to showing us something about the nature of time in our universe, it is a decent metaphor for why human regret can be counterproductive. You can’t unstir the pudding, after all.

Enterprising geeks have cooked up an entertaining new way to rapidly increase the entropy of a bunch of popsicle sticks or tongue depressors. It’s like a more energetic version of dominoes, and well worth a look both forwards and backwards.

The Invention of Lying

The film Ricky Gervais film The Invention of Lying is based around a fascinating central conceit, but ultimately fails to explore it in an interesting way. The film imagines a world in which people are simply incapable of telling falsehoods, and in which they automatically accept any statement from another person as true. While bits of the film are very funny, it is disappointing that the protagonist who learns how to lie uses it for such uninspired things as cheating at casinos and manipulating the affections of the pretty but dull female lead. Indeed, beyond her appearance there is never any indication of why she is an especially desirable partner. You would think someone with truly awesome powers to manipulate all of humanity might dream up some grander projects than getting rich and rearing children with the woman he happened to meet just before his discovery.

One awkward issue is that people frequently provide bad information for reasons other than deceit. They provide old information, misunderstand things, get bad readings from equipment, and so on. In any functional world, people would need to be able to realize that these sorts of errors occur. Furthermore, this kind of basic scrutiny seems absolutely necessary for the development of science and technology. It is hard to see how people could be capable of parsing out bad information that others provide by accident, while simultaneously being unable to imagine that someone might intentionally tell them something incorrect. As such, Gervais’ world would either be seriously lacking in scientific or technological sophistication or simply be very improbable.

I also think a world without lying would be dramatically different from ours in ways that go beyond dialogue, the procedures at banks, and the kind of films that are made. I doubt that the basic political and social structures in such a world would so closely resemble ours, given the extent to which falsehood and misinformation are fundamental to our political and economic systems, and even our day-to-day interactions. The film never shows much of the world beyond the first world town in which it is set. You have to wonder what the world at large would resemble. For instance, it seems unlikely that dictators could emerge or endure in a world where they needed to be entirely truthful. It is also interesting to imagine what the world of international relations and diplomacy would look like.

The actual invention of lying is what security researchers would call a ‘class break’ – a discovery that renders an entire system vulnerable by creating new sorts of attacks. For instance, while learning the combination to one lock could permit a security breach, realizing that all padlocks of a certain type can be opened with a shim is a class break. Being able to lie to people who would automatically accept anything you claimed as true would be an overwhelming instance of this effect. Indeed, it seems impossible that in a world governed by natural selection, the ability to be deceitful would not spread rapidly, completely eliminating the trusting world that existed before, and which was in an unstable state as soon as lying became possible. You would eventually expect a new equilibrium to arise with key features present in our own world: from mental scrutiny to background checks to legal systems designed to minimize the damage caused by malicious individuals.

In any event, the film prompts some interesting thinking, even if it sticks to a rather conventional romantic comedy structure (complete with the nasty bad guy competing for the trophy woman in question). I suppose the film’s value lies more in the comedy than in really exploring the central concept. Some of the explicitly truthful dialogue is certainly quite amusing, particularly when it occurs in places where we expect white lies, rather than malicious falsehoods, to be told. For instance, the first date between the male and female lead, set in a somewhat fancy restaurant, is perhaps the best part of the film. It is when the most trivial lies are avoided that the most amusement results.

Media from the anti-prorogation protests

Today’s Ottawa protest against the prorogation of Parliament drew fewer people than the Fill The Hill climate protest, though it enjoyed much nicer weather.

Here is a slideshow of all of my photos from today. Higher resolution versions are available on request.

One of the more entertaining parts of today’s rally was Trevor Strong‘s song “The Wild Proroguer.” This member of the Arrogant Worms modified a traditional song to include lyrics about Canada’s second prorogation in about a year. The MP3 is on his website; I uploaded a video of the performance on Parliament Hill to YouTube.

This might be the funniest sign I saw today. The owner will never need to make another one, regardless of how many protests or counter-protests they decide to attend.

Note: all this content is covered by a Creative Commons license. Feel free to use it for non-commercial purposes, with attribution.

[Update: 24 January 2010] Other Ottawa bloggers also attended the event: Zoom, Watawa Life, and Coyote.

LC^3T: Part I concluded

The video above should demonstrate why I normally leave the videography to my far more talented brother Mica. Still, I hope it will convey some sense of what it was like to cross Canada by Greyhound Bus, a few days before Christmas in 2009.

I hope everyone enjoys the holidays.

[Update: 13 January 2010] A video from the second half of the trip is now online.

Milk

Red tow-away sign

Watching Milk was a reminder of the unusual sort of luxury supporting the gay rights movement actually provides. It is the kind of utterly unambiguous moral movement that emerges only rarely: where one side is unassailably aligned with human welfare and human rights, and the other is straightforwardly mistaken from top to bottom.

While it is tragic that significant numbers of educated people – people who think of themselves as ethical – continue to oppose equal rights for gay men, lesbians, bisexuals, and transgendered people, it does seem worth hoping that the movement opposing these basic liberties will falter and die within our lifetimes, at least within the kind of developed states that have largely abandoned bigotry motivated by ill-founded personal revulsion or oppressive religious notions of morality. While it will take longer for the world as a whole to reach such a state, there does also seem to be reason to hope that it will eventually happen.

In the mean time, the movement for gay rights will continue to have a special motivating character, for all those who aspire to a more equitable and less benighted world. It represents one of the purest contests of sense and tolerance against bigotry and violence ongoing in the world today.

Fill the Hill 2009 video

Today’s climate change rally on Parliament Hill was a great success, with a huge number of people showing up despite the nasty weather. The speakers were strong, and the mood in the crowd was very positive. It’s great that people have rallied around such a challenging target, with the 350 campaign. Let’s hope that this movement can grow to the point where policies to end deforestation and the use of fossil fuels become mainstream and effective, around the world. That’s the only way we will be able to avoid dangerous climate change.

I don’t have my brother Mica’s talent for editing video. If someone wants access to the unedited files, please let me know and I will provide them. Perhaps they can be incorporated into a more sophisticated product, with music and such.

The Age of Stupid

Metal steps

The Age of Stupid is a poignant and timely film, based around the conceit of sending a warning to people today through fictional retrospective, based on real climatic science and the consequences of continued inaction. It forcefully conveys the point that climate change is the overwhelming moral and political issue of this era. If we deal with it, other things will have importance; if we allow runaway climate change to occur, it will eclipse any other failures. The film is a good example of climate change art, and should especially be watched by those who basically accept the science of climate change but don’t feel the level of motivation necessary to produce real change. It’s not about using fewer plastic bags – it’s about pushing for a new energy basis for human civilization. We need to take personal responsibility – and agitate for systemic change – in ways that go beyond the symbolic and the trivial.

The film makes a number of key points in a convincing and accessible way. Climate change must be managed internationally in a way that respects the importance of poverty reduction in the developing world, as well as the vital point that the pattern of fossil fuel-fired development followed in the West cannot be repeated (contraction and convergence). It stresses how lags in the climate system mean we need to take decisive action long before the full consequences of our choices become visible. On one critical point, the film is both clear and correct: we simply cannot burn all the remaining fossil fuels. There is a maximum level, corresponding at the very most to the lower threshold of runaway climate change. We need to work out what that amount is, and then find a way to divide it among all of humanity, cutting to zero before we exceed it.

The film also stresses how air travel really cannot be part of a sustainable future, when one long flight represents three years’ worth of of acceptable total emissions for a single person, at the levels that need to become ordinary within the next few decades. Especially in the states where per capita emissions are highest (and where the deepest and fastest cuts must be made), we all need to be moving towards lives that do not include such extravagances.

The film also effectively conveys how foolish ‘Not in My Backyard’ (NIMBY) resistance to renewable energy projects really is. People who resist wind farms because they fear their views would be spoiled are completely failing to understand the scale of the challenge we face. While the film doesn’t make the point, the same might be said of those who have a knee-jerk hostile response to big dams, nuclear power, carbon capture and storage, etc. Indeed, it seems inevitable that people fifty years from now would watch this film with interest – either deservingly patting themselves on the back for having achieved a historic transition to zero-carbon energy, or ruefully kicking themselves after being reminded that the consequences of humanity’s selfishness and failure of think at scale were predictable in 2008.

One neat little detail capped off the presentation for me. During a montage showing a succession of years, overlaid with sound and video describing runaway climate change emerging and taking hold, someone around 2030 is quoted asking whether climate change is really happening or not. It is truly frustrating that the understanding of climatic science within the general population is so poor, and has been so effectively confused by the status quo lobby and the failure of individuals to show imagination and empathy.

The Age of Stupid didn’t leave me any more confident that humanity will be able to deal with this problem, but it did re-affirm my commitment to pushing for a sustainable outcome. That would be one that forever replaces the energy basis of our global society, shifting from one based on dwindling hydrocarbons – the by-products of which are wrecking the climate – to one that we can maintain forever.

More misrepresentation of climate science

A YouTube user called greenman3610 sometimes puts up videos in a series called the ‘climate change crock of the week.’ One that he put up recently is illustrative of how scientific information about climate change is misrepresented in the media.

The initial remarks concerned how there is always random variation around the overall warming trend being caused by increasing greenhouse gas concentrations. The featured later media discussion suggests that the original speaker has now abandoned the view that greenhouse gasses cause warming – something that is blatantly contradicted by the original transcript.

The fact that such misrepresentation occurs is depressing for two reasons. First, it shows how low the ethical and journalistic of at least some media outlets have become. Second, it reveals the extent to which people in general are too ignorant of climatic science to identify which claims are credible and which are absurd.

Thankfully, sources like DeSmogBlog and RealClimate put a lot of effort into rebutting faulty arguments that find purchase in the media.