Name: 注入地球的碳能拯救我們的地球嗎？ (Could Injecting Carbon Into the Earth Save Our Planet?)
Uploaded: 2021-01-14T10:20:57.000Z
Duration: 4 min 52 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

Iceland: the land of majestic waterfalls, black sands, sparkling glaciers, and... maybe

one of the world’s wildest solutions for solving climate change?

Nestled beside the majestic hills of southwestern Iceland, are a series of huge pods

capable of taking CO2 that's been snatched from the air and injecting it into underground stones,

where the gas can be stored safely for millenia.

And yes, this might sound like the stuff of science fiction, but it’s all real, and

Just so we’re clear, our planet is heating up, and fast.

CO2 levels now exceed 415 parts per million, higher than they’ve ever been in the past

And while there’s dispute over what number constitutes a dangerous threshold, there is

consensus that those levels must drop to avoid imminent catastrophic warming.

The Intergovernmental Panel on Climate Change, or IPCC, estimates that by the end of the

century we must pull at least 100 gigatons of CO2 and as much as

1,000 gigatons of CO2 from the atmosphere.

Which, to put that into perspective, is the equivalent of 20 years worth of global greenhouse

So now you’re probably thinking the same thing that I’m thinking: HOW are we

Well, in addition to the rapid adoption of renewable energy and wide-scale reforestation,

the IPCC maintains that carbon dioxide removal technologies will be critical to tackling

And that’s where direct air capture, or DAC technology, comes into play.

This idea of pulling CO2 directly from the air has actually been around for well over

a decade, but it’s only been in the past few years that this tech has really come into its own.

DAC works by redirecting carbon dioxide from the atmosphere and placing it somewhere

At least, that’s what Climeworks has been doing at its plant in Iceland since operations

The machine consists of a single collector

that's able capture CO2 straight from the air using reusable filters.

As air is drawn into the plant, the CO2 molecules within it chemically bind to filter materials.

The filter is then heated up to about 100°C, causing the CO2 molecules to unstick from

the filter and collect as concentrated gas.

This gas is then mixed with water and injected underground, where it reacts with basalt to

Meanwhile, the CO2-free air is sent back from whence it came, and the cycle repeats.

While removing 2,500 metric tons of CO2 from the atmosphere and safely storing it beneath

the Earth is one use, Climeworks is also demonstrating captured carbon’s ability to transform into

methane that can be used to power cars, like at its plant in Italy.

And over in Switzerland, a waste incineration site supplies power to their  their DAC plant,

which funnels captured carbon into nearby greenhouses to ripen vegetables.

By demonstrating captured carbon’s many uses, Climeworks has managed to become the first-ever

The company also excitedly claims that its technology is a negative emissions solution,

meaning that more carbon is being moved from the biosphere to the geosphere than the other

But there’s some question over whether or not this technology can truly be effective.

Right off the bat, it’s clear that it must be massively scaled up if it’s ever going

to make a dent in the 1,000 gigatons of CO2 that we have to scrub from the air.

While the Climeworks plant in Switzerland is capable of capturing 900 metric tons of

CO2 annually, the biggest concern is the fairly substantial energy expenditures needed to

extract all that CO2 from the air in the first place.

According to company estimates, the scaled up process will use about 2,000 KWh of heat and 650 KWh

By sequestering carbon onsite and using renewable energy from nearby geothermal plants, the

Iceland operation intends to lessen its carbon-footprint...but all of this still makes you wonder

Climeworks has set a goal to eliminate about 400 million metric tons of CO2—or about

1% of global emissions—by 2025, banking on carbon’s increasing value as a trading

commodity that can help potential buyers, like energy companies and countries, meet

But it’s still just a 1% reduction, so it’s clear that while technologies,

like Climeworks' solutions, are really cool, they can't tackle climate change alone.

And the race to find more solutions is still very much on.

Do you think that this carbon-capture technology can really make a dent in removing atmospheric carbon?

And don’t forget to subscribe for more Seeker.

As always, thanks for watching and we'll see you next time.

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注入地球的碳能拯救我們的地球嗎？ (Could Injecting Carbon Into the Earth Save Our Planet?)

critical

eliminate

demonstrate

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