比尔·盖茨讲对气候创新者的需要 Bill Gates on the need for climate innovators

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Without substantial change, getting the greenhouse gas emissions down, we are on a path to large increases in the planet's temperature. You hear a lot about the progress in reducing the cost of renewable energy to make electricity.

But generating electricity isn't the only contributor to climate change. It accounts for only about 25 percent of all greenhouse gas emissions.

With greenhouse gases you have the electricity sector. But you also have manufacturing, transportation, agriculture, buildings, as well as about 10% from other sources.

We need innovation going out there and finding inventors across all these different areas and understanding their energy R&D activities to make sure that they have a path from their laboratory to scaling up into very large numbers. For electricity, wind energy and solar energy prices are coming down.

So the electricity sector has to either be able to store that energy or have other zero-emission sources to maintain the reliability that we all depend on. Manufacturing.

Here we're talking about all the stuff we buy: furniture, beds, the cars themselves, all of those things. Just the very process of making cement is CO2 emitting.

There's a lot of embedded energy. We'll have to change the way that we do that manufacturing.

Transportation. Immediately people think about passenger cars.

And they are a big part of that. But transportation is quite broad.

We've got railroads. We've got ships.

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