Hi there, I'm Adrienne Murray. Welcome to Business Daily on the BBC World Service. Today's program comes from Iceland, where new technology joining the fight against climate change is being put to the test. I'm about to visit a project where machines are sucking carbon dioxide out of the air.

We need to be active in cleaning up all the mess that we've been making since the industrial revolution.

And then locking it away deep underground.

As a rule of thumb, it takes two years for the CO2 to turn into stone and stays down there as a mineral forever.

Some think this could be a crucial tool to help meet our climate targets,

but just how impactful and how economical might this technology be.

Those are questions I'll be exploring on today's episode.

Trillions of tonnes of greenhouse gases have already been pumped into the atmosphere,

and carbon dioxide, the main gas responsible for global warming, is still being emitted in record

amounts. But what if we could take away some of that carbon and put it back where it came from?

Well, that's the basic idea behind a wave of carbon removal technologies that capture carbon dioxide

from the atmosphere and then store it. Among them is a method called direct air capture,

and it's beginning to catch on.

Head about 30 kilometres south-east of Iceland's capital Reckievich, and you'll find Helishidi.

It's an otherworldly landscape that's home to a direct air capture plant called Orca.

We're getting closer now, and there's a noticeably eggy, sulphurous smell in the air.

The steam just ahead is coming from the nearby geothermal power plant.

And that's what's supplying clean energy for the carbon-sucking machines that we're about to see.

Elevated on legs are what looked like

eight shipping container-sized machines

and dozens of noisy fans.

This is the world's first direct air capture and storage plant

...