Iron ore is a key ingredient in steel-making.

铁矿石是炼关键成分。

Prices for the coking coal used in steelmaking have risen sharply this year.

炼焦煤价格今年大幅上涨。

Carnegie a new but simple method of producing steel.

展示了一种新颖而简单炼方式。

Carneg risks everything he's got on the new plant.

卡内基把全副身家都押在这个新炼厂上。

Iron and nickel melted and sank to the core, generating heat like a massive furnace.

铁和镍融化，汇集到地核产生巨大热量，就像炼炉。

In fact, worldwide, steelmaking is responsible for 5 percent of annual emissions.

实际上，每年炼所排放温室气体占全世界量5%。

The trick? Produce steel the way we make aluminum: use electricity rather than flame.

什么窍门？制铝方式炼：利电能而不是火。

In the hot, noisy factories where steel was made, she saw beauty and a subject for her pictures.

在炎热、喧闹炼工厂里，她看到了美，也看到了她照片主题。

The temperature required to make an authentic Neapolitan pizza is stupidly, unbelievably hot-more blast furnace than broiler.

制作正宗那不勒斯披萨所温度高得离谱，令人难以置信，它更像是炼高炉温度，而非普通烤箱。

But they ended up buying just the steelmaking coal division.

但他们最终只收购了炼煤部门。

But mostly it's for making steel.

但主要是为了炼。

To make steel the old-fashioned way, you blast iron ore with heat and purify the resulting molten metal with oxygen.

旧炼方式是加热铁矿石使其燃烧，然后氧气净化溶化铁水。

At least that's how it was before the factory moved in.

军队在那边大炼铁。

And they had giant properties that were built for the old ways of making steel.

他们拥有按照旧炼方式建造巨大财产。

When the oxygen is used to make steel, that also emits carbon dioxide.

当氧气被来炼时，也会排放二氧化碳。

As a result, steelmaking accounts for 7-9% of the world's anthropogenic greenhouse-gas emissions.

因此，炼占世界人为温室气体排放量 7-9%。

It can be used to make fertilizer, or it can be used to make steel without emissions.

可以来做肥料，也可以来炼，没有排放。

That hydrogen can then power applications in transportation and industry, such as making steel or chemicals.

然后， 氢可以为运输和工业应提供动力，例如炼或化工。

Machinery for steel making had a more extensive development in this country than in England or Germany.

炼机械在这个国家比在英国或德国有更广泛发展。

That point — steelmaking's massive carbon footprint — underlines just what a game-changer green hydrogen could be.

这一点——炼巨大碳足迹——突显了绿色氢能改变游戏规则。