This is The Guardian.

Today, listening in on a phone scammer at work.

What to you is Vertical Farming?

Vertical farming is a high-density farming operation where you control every aspect.

It's delivering in terms of volume, it's delivering in terms of quality,

but also we're tackling some quite important climate change drivers in terms of CO2 reduction, reduced water consumption at the same time.

Tesco is working with its suppliers to find more sustainable ways to grow our food.

To find out more, visit theguardine.com forward slash Tesco sustainability.

This message was paid for by Tesco.

Just a heads up, this episode contains strong language.

Hello? Hello? Yeah, Marcel, this is Mary.

I don't understand what you're hearing is of a man in Canada,

speaking to a woman he thought was his financial advisor.

For weeks, he had spent hours on the phone with her

and invested thousands of dollars into what he thought was a cryptocurrency scheme.

Only now, he's found out the truth.

No, no, no.

Atomic told me there is no value to my hearing.

The account he thought he was investing in, it doesn't exist.

Showing zero in the transaction.

Instead, all that money has been going to his scammer.

Where's my deposits?

...