SDcamps•演辩营全国英语演讲与辩论赛
Now let's talk about costs. 现在让我们谈谈成本问题。 An energy-intensive version of this technology could cost you as much as $1,000 a ton just to capture it. Let's translate that. 如果仅仅为了捕获一吨二氧化碳而选择在该技术上投入大量能源，其花费将多达一千美金。让我们解释一下这句话。 If you were to take that very expensive CO2 and convert it to a liquid fuel, that com...
In addition to those kinds of investments, we also need investments in research and development. 除了这些投资，我们还需要人们在研发项目中投资。 So what might that look like? 这意味着什么呢？ In 1966, the US invested about a half a percent of gross domestic product in the Apollo program. 1966年，美国百分之五十的GDP被用于投资阿波罗计划。 It got people safely to the moon and ba...
But I want us to reflect a little bit again on negative emissions. 但是我想提醒大家再次对负排放进行反思。 Negative emissions should not be considered a silver bullet, 负排放不应该被当作是万全之策， but they may help us if we continue to stall at cutting down on CO2 pollution worldwide. 但是它们可以在实现真正减少全球二氧化碳排放前帮我们争取一些时间。 But that's also why w...
Now, what would it take in terms of land area to do this, 200 plants? 那么要建造200个工厂，需要多少土地呢？ It turns out that they would take up about half the land area of Vancouver. 事实上，它们将占据温哥华大约一半的土地面积。 That's if they were fueled by natural gas. 这还是在利用天然气作为燃料的前提下。 But remember the downside of natural gas — it also emits C...
So what I'm showing you here is what a system might look like to do just this. 我现在向你们展示的是一个具备这种功能的系统可能的样子。 This is called an air contactor. 它被称为空气接触器。 You can see it has to be really, really wide in order to have a high enough surface area to process all of the air required, 可以看到，它必须设计得非常非常宽，这样才能获得足够大的表面积...
Four hundred parts per million: that's the approximate concentration of CO2 in the air today. What does this even mean? 百万分之四百：这就是现在空气里二氧化碳大概的浓度。这意味着什么呢？ For every 400 molecules of carbon dioxide, we have another million molecules of oxygen and nitrogen. 意味着每四百个二氧化碳分子，都混了另外一百万个氧和氮分子。 In this room today, there ...
And now once you've captured the CO2, 在二氧化碳被捕获之后， you have to be able to recycle that material that you used to capture it, over and over again. 我们还需要能够循环使用用来捕获它的材料，持续不断进行捕获。 The scale of carbon capture is so enormous that the capture process must be sustainable, 毕竟，当碳捕获具备了庞大的规模，其捕获方法必须能够满足长远需求 and yo...
Switzerland-based Climeworks and US-based Global Thermostat use a different approach. 位于瑞士的Climeworks和位于美国的Global Thermostat使用的则是不同的方法。 They use solid materials for capture. Climeworks uses heat from the earth, or geothermal, 他们使用的是固体材料捕获。Climateworks使用来自地球的热量或者地热能， or even excess steam from other industrial processes to cut ...
I want to step back, and I want to bring up the concept of negative emissions again. 我想退一步，再次提出负排放的概念。 Negative emissions require that the CO2 separated be permanently removed from the atmosphere forever, 负排放，需要被分离的二氧化碳永久性地从大气层中去除， which means putting it back underground, where it came from in the first place. 这意味着把它送回地下，...