From the BBC World Service.
This is the Conversation, the show that brings two women together who share an expertise.
And we see what happens is the future of farming indoors.
Today, we're talking innovative indoor crop farming.
Think farms without fields, vertical farms reaching up to the skies, farms on fish tanks, on rooftops.
Some hope that growing plants without soil might one day meet the needs of an increasing global population in a more sustainable way.
It aims to reduce some of the environmental impacts of traditional agriculture.
And according to some figures, it's a market worth billions of dollars a year in North America alone.
Rebecca Nelson is the CEO of Nelson & Paid in Wisconsin, USA, and is a longtime pioneer of aquaponic farming using fish in tanks in place of soil.
Grace Lim is co founder and CEO of Urban Farming Partners and has turned to hydroponics to run a vertical indoor she calls Grow Grace in an urban warehouse in Singapore.
And I'm Ela Elshamahi.
Ladies, welcome to the Conversation.
Such a pleasure to be here.
Thank you.
You've both turned to indoor farming, Rebecca in the 80s in the USA, and Grace very recently in an urban setting in Singapore.
Now, I've seen these farms and, well, they don't look in any way, shape or form like a traditional farm.
Could you help paint a picture for our listeners of what sometimes feels like science fiction?
Rebecca?
I definitely agree that the types of farming we're talking about don't look like traditional farms.
The type of farming we do, aquaponics, we have both fish and vegetables in an integrated system.