Take some time for yourself with soothing classical music from the mindful mix, the Science of

Happiness Podcast.

For the last 20 years I've dedicated my career to exploring the science of living a happier more meaningful life and I want

to share that science with you.

And just one thing, deep calm with Michael Mosley.

I want to help you tap in to your hidden relaxation response system and open the door to that

calmer place within. Listen on BBC Sounds. You're listening to crowd science from the BBC World Service. I'm Marnie Chesterton.

This is the show that takes your listener questions about anything, life, earth, the

universe and aims to answer them, which is why we've all come to the banks of the River Thames

for a little row around.

How good?

I try not to crash into boats.

And the reason we're doing this mainly because it's fun but partly

because we've had this listener question from Waheed in Afghanistan.

Hello crowd science I I'm Waheid talking to you from Afghanistan, Ghazni province.

Let me put you this week topic for crowd science at the BBC World Service.

What happens in case that the underground water depends

and is it depletable? political. Weed,

listen, thank you so much for your voice message.

So you were asking crowd science if we could use up all of the groundwater,

is it depleable and I'm just

wondering why you want to know to if you could tell me a little bit more about

...