After the world has collectively dragged its feet for far too long to slow down climate change, companies and governments are now championing a deceptively simple solution: filtering carbon dioxide out of the air and burying it deep underground, or turning it into everything from jet fuel to yoga mats.
The technology, known as direct air capture, has lately gathered steam as climate scientists warn that, without it, humanity stands little chance of limiting global warming to acceptable levels.In its latest report, the Intergovernmental Panel on Climate Change said that using carbon removal – which also includes measures such as planting trees or enriching the soil with minerals – will be “unavoidable” if the world wants to hit net-zero emissions.
Buoyed by those predictions, the industry has already gathered serious momentum. U.S. President Joe Biden’s infrastructure package allocated $3.5 billion for several direct-air-capture hubs last year, and plans are underway to build the first truly large-scale plant in the southwestern United States, which will eventually trap up to one million tonnes a year.
Private investors have also piled in: Climeworks, a Swiss company that is one of the burgeoning industry’s biggest players, bagged US$650 million in its latest round of fundraising. And corporations from tech giant Alphabet to payments company Stripe recently committed close to US$1 billion to buy removals from innovative start-ups in the space.
That is not to say direct air capture is without its critics. Some point out that the vast amounts of energy needed to draw heavily diluted carbon out of the air is better used elsewhere. Others fear that relying on so-called negative emissions technologies is merely giving high-emitting companies an excuse to keep on polluting, with catastrophic consequences for the climate.
Although it may sound high-tech, drawing carbon from the air is surprisingly straightforward in practice. At Climeworks’s flagship facility in Iceland, the largest in the world, stacks of giant fans suck in the ambient air; inside, it passes over a filter that collects the carbon dioxide, which is then released under high heat. (Other companies separate the carbon by passing air through chemical solutions instead.)
Buoyed by those predictions, the industry has already gathered serious momentum. U.S. President Joe Biden’s infrastructure package allocated $3.5 billion for several direct-air-capture hubs last year, and plans are underway to build the first truly large-scale plant in the southwestern United States, which will eventually trap up to one million tonnes a year.
Private investors have also piled in: Climeworks, a Swiss company that is one of the burgeoning industry’s biggest players, bagged US$650 million in its latest round of fundraising. And corporations from tech giant Alphabet to payments company Stripe recently committed close to US$1 billion to buy removals from innovative start-ups in the space.
That is not to say direct air capture is without its critics. Some point out that the vast amounts of energy needed to draw heavily diluted carbon out of the air is better used elsewhere. Others fear that relying on so-called negative emissions technologies is merely giving high-emitting companies an excuse to keep on polluting, with catastrophic consequences for the climate.
Although it may sound high-tech, drawing carbon from the air is surprisingly straightforward in practice. At Climeworks’s flagship facility in Iceland, the largest in the world, stacks of giant fans suck in the ambient air; inside, it passes over a filter that collects the carbon dioxide, which is then released under high heat. (Other companies separate the carbon by passing air through chemical solutions instead.)
Nearby, another plant run by the Icelandic company Carbfix mixes the concentrated carbon with water inside a group of pentagonal spheres that lend the site the eerie look of a space colony. The mixture is then pumped deep underground, where it reacts with basalt rock and turns solid within a few years. Corporate Knights - link - Yannic Rack - link - more like this (carbon capture) - link - more like this (Switzerland) - link
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