the blue nile heads north through these vast irrigated lands to join the white nile before meanderingd in ancient history. we're following it to ask if a row over who controls its flow could lead to war. it's here in khartoum that the blue nile and the white nile meet and merge and then head north to egypt. the river has travelled about a third of the way from its source to the sea and is growing and strengthening in size. so what does sudan, this vast country now emerging from years of us sanctions, think about ethiopia building this dam upstream? well, it thinks it's a great idea. land is not in short supply and with the power of the sun and the waters of the nile, sudan's agricultural potential is huge. this is alfalfa, top—quality cattle feed, and this farm can cut nine harvests a year for cows, but primarily for export to the middle east. sudan has the right to take billions of gallons of water every year through old treaties with egypt, but claims it hasn't been using its full allocation. the suggestion it now might is a source of tension with its northern neighbour. this farm i

a film screening at the blue nile economy if the o.p.'s only film school today student get it to use and gallo is presenting his first film a documentary about rastafari. the film screening history but trainer abraham haley barrow is not quite satisfied with its cinematography the guy is in the dark so you need more light to see him and maybe you can come closer to that. truth. or in the interview what he's saying. abraham haley barrow is a camera man and a filmmaker his films have won international awards because there was no film school and if your peer he studied in the netherlands now he wants to teach young filmmakers in his home country. i wish the interview macadam to create up the quality of see my hears that young talent. because there is no seema school here at all so for me is very important that the young talent. can learn what it is and that i can support a little bit after a year of initial training the students can choose their major cinematography screen writing directing or editing abraham has already trained more than on

question i ask always because no one can ignore that what is going on in darfur or noble mountain or blue nile is a normal situation there's a dorsai going on there so there's well it's country should give as a right to live so it should give us. a bit degrades of human being or or if it is and i guess the they have the ability to do that thank you or right it's been a fascinating discussion but i'm afraid we are winding down now so it is time to end the show and thank our guests very much for their participation money in her own gill hoffman and a soft white. and thank you to fortune you can see the show again any time by visiting our website al-jazeera dot com of a further discussion head over to our facebook page that's facebook dot com forward slash a.j. inside story you can also join the conversation on twitter handle there is at a.j. inside story from me sam is a bad man the whole thing here for now is go by. my . lou winning the will of the people hinges on the mass media and state p.r. machine it's going to overdrive. but just who is influencing who. we just don't know yet where the li

heard a fluorescent dye called nile red to the sample and it binds to the surface of the tiny plastic particles —— wear you read. it makes them grow when you shine a bluethe reason we developed this technique is to allow people to do studies exactly like this, to be able to do large—scale exactly like this, to be able to do la rge—scale sampling, look exactly like this, to be able to do large—scale sampling, look at a very large—scale sampling, look at a very large numbers, and that way you can get a much clearer picture of what is going on in a situation like this. does it change your behaviour when it comes to buying bottled water? well, i would like to think i am quite environmentally focused a nyway am quite environmentally focused anyway so i try very hard not to buy bottled water. but it is very clear that worldwide we have to do something about this problem because currently 480 billion bottles are being sold every year worldwide and it is more than one per person per week for the whole population of the planet and this is clearly insane. we need to think about this in an entirely different way. would you agree with that? i do agree that we need