I am Ansoi, a reporter based in Nairobi and I'm going to find out what has brought all these

angry slum dwellers out on the streets.

This is a typical street in Kibera slum, five kilometers from Nairobi's Central Business District,

and one of the largest urban slums in the whole of Africa.

Ayaman Soy, a Kenyan journalist, journalist and have reported from here for the BBC many times.

You've seen it before on television, mothers with babies tethered to their backs,

corrugated iron roofs, mud and plastic bugs everywhere,

children running around pothold roads, traffic, you name it.

This is how more than a million people live in Nairobi Slums.

But why do these places and these conditions perpetuate?

It turns out that slums are big business.

In this documentary for the BBC World Service,

I am taking one street as my starting point

to trace back the fraught and contested ownership chain back to its source

and look at slum dwellers efforts to release themselves from the power of the

landlords in the slumlords of Nairobi.

I'm walking down a dirty path.

Now, I've just branched off the main road. I've had to jump over drainage with

very dirty water. I've got to be very careful. It looks slippery. It's muddy.

There are polykin bags on the ground. Okay, I survived that one. And here we are. We've come to a house that's made of mud on the walls.

I can see they used bamboo to support the mud.

There's a wooden window and iron sheet roofing.

...