Hello, I've just nipped in before your BBC podcast starts to tell you all about

You're Dead to Me. We're the comedy podcast that takes history seriously, also from the BBC

and presented by me, Greg Jenner. I should have told you that at the beginning, sorry.

Anyway, like many other BBC podcasts, such as Desert Island Discs, Evil Genius, or In Our Time,

your Dead to Me is available first on BBC Sounds, a whole month earlier than anywhere

else in fact. So if you can't wait another day to hear the very latest in history and loads

of other good stuff, then listen first on BBC Sounds. Water scarcity is an increasing problem

on every continent, according to the United Nations.

I just want to grab it from them and turn the tap off. Please don't use so much water.

It's estimated that around half of the world's population experiences severe water scarcity for at least part of the year.

Climate change and population growth is expected to make the situation worse.

It's not only about today's amount of water that we're using. It's thinking about what comes

ahead. This is the food chain from the BBC World Service. I'm Ruth Alexander. And this week,

we're finding out what daily life is like when water is in short supply.

My water today has been cut off since 8 a.m. and won't be back on until 8 a.m. tomorrow.

We'll find out how people adapt and what solutions are being explored.

We say let's go for it.

Now let's bring the costs down.

Let's build up the capacity to distribute this to more places in the world.

We start in Pakistan, where our reporter, Barakshabir, has been watching water tankers arrive to bring supplies to the residents of one of the world's mega cities.

Good afternoon from Karachi, a seaside city of over 20 million people in Pakistan.

I'm standing by numerous huge water tankers at one of the seven water hydrants in the city.

...