-In summer, the temperature reaches more than 48 degrees Celsius. We are using this bigger cooling fans. We are using these misters. All these together reduce the temperature by 20 degrees Celsius from outside. The cows produce up to three times as much milk as Sudan's native breed. Thanks to the waters of the Nile.

-Shall we go in?

But as populations along the Nile continue to rise and farming here intensifies, an ever greater strain will be placed on the river. -How many do you get now?

-We've got now 2,500 cows, our plan here in two years to expand to 10,000 cows. -Feel a bit conflict about what I am saying here, because although I am sure they're farming with the best of intensions, they are using a lot of water from the Nile. And although they say that the amount they're using is sustainable, what will happen if they were 100 farms like this, 1000 farms like this, sucking water out of the river? There won't be a lot left to flow on down, through the rest of Sudan into Egypt. Who does the Nile belong to? It comes back to that question. Who has rights to the water of the Nile? And there's something that the countries along the Nile haven't reallydecided and haven't been able to come to an agreement on. Coming to a crucial point on the river.