Did Bill Gates Just Give the Most Important Climate Speech of the Year?

On Friday, the world's most successful businessperson and most powerful philanthropist did something outstandingly bold, that went almost unremarked: Bill Gates announced that his top priority is getting the world to zero climate emissions.

Now, I'm not a member of the Cult of Bill myself (I'm typing this on a MacBook), but you don't have to believe that Gates has superhuman powers of prediction to know that his predictions have enormous power. People who will never listen to Al Gore, much to less someone like me, hang on Gates' every utterance.

And Friday, Gates predicted extraordinary climate action: zero. Not small steps, not incremental progress, not doing less bad: zero. In fact, he stood in front of a slide with nothing but the planet Earth and the number zero. That moment was the most important thing that has happened at TED.

What, exactly, did he say, and why is it so important?

Gates spoke about his commitment to using his massive philanthropic resources (the Gates Foundation is the world's largest) to make life better for people through public health and poverty alleviation ("vaccines and seeds" as he put it). Then he said something he's never said before: that is it because he's committed to improving life for the world's vulnerable people that he now believes that climate change is the most important challenge on the planet.

Even more importantly, he acknowledged the only sensible goal, when it comes to climate emissions, is to eliminate them: we should be aiming for a civilization that produces no net emissions, and we should be aiming to live in that civilization here in the developed world by 2050.

Obviously, that's a big goal. Because he is the world's biggest geek, to explain how he plans to achieve that goal, Gates put up a slide with a formula (which we can call the Gates Climate Equation):

CO2 = P x S x E x C

Meaning this: the climate emissions of human civilization are the result of four driving forces:

* Population: the total number of people on the planet (which is still increasing because we are not yet at peak population).

* Services: the things that provide prosperity (and because billions of people are still rising out of poverty and because no global system will work unless it's fair, we can expect a massively increased demand for the services that provide prosperity).

* Energy: the amount of energy it takes to produce and provide the goods and services that our peaking population uses as it grows more prosperous (what some might call the energy intensity of goods and services). Gates believes it's likely cutting two-thirds of our energy waste is about as good as we can do.

* Carbon: the amount of climate emissions generated in order to produce the energy it takes to fuel prosperity.

Those four, he says, essentially define our emissions (more on that later). In order to reach zero emissions, then, at least one of these values has to fall to zero. But which one? He reckons that because population is going to continue to grow for at least four decades, because billions of poor people want more equitable prosperity, and because (as he sees it) improvements in energy efficiency are limited, we have to focus on the last element of the equation, the carbon intensity of energy. Simply, we need climate-neutral energy. We need to use nothing but climate-neutral energy.

To do that, we need an "energy miracle." We need energy solutions that don't yet exist, released through a global push for clean energy innovation. That, in turn, demands that a generation of entrepreneurs push forward new ideas for renewable energy, unleashing "1,000 promising ideas." He described one of his own investments, but went on to note that we need hundreds of other ambitious companies as well, and he plans to put his own efforts into this arena.