. >> reporter: the proposed cambodian dams are also close to the home of the mekong dolphins. the dolphin population has been in steady decline over the years but more recently the rate of decline has fallen thanks to conservation work. the construction of dams could undo that work. it is thought there's only 80 left in the mekong and changes could wipe them out. government in the region argue that harnessing the energy of this river and turning it into electricity is essential to helping their committees. the alternative argument is that the price for that development is too high >>> in part 3 of our rivers of life series, he is in nigeria looking on how the declining fortunes of the country are affecting people's lives. why not take a look at our web page, the stories that you guys are clicking on are right there with plenty of analysis and video. the address is al jazeera.com. headlines are coming up. ming up. >>> tonight nearly 90% of americans playful i.s.i.l. is a threat to the united states. -- believe. in our panel is donald trump is good for american politics. my thou

. >> reporter: the proposed dams are close to the hand of the mekong dolphins. the dolphin population has been in steady decline for years, but more recently the rate of decline has fallen thanks to conservation work. the concern is the construction of dams could undo that work. it's thought there are only around 80 left in the mekong and even minor changes to an already fragile ecosystem could wipe them out. governments in the region argue that harnessing the energy of this great river and turning it into electricity is essential to help develop their economies, but the alternative argument is that the price for that development is too high >>> coming up in sport, details of a new overall leader after the latest women's world cup slalom event in france. n france. >>> for the sport. >> reporter: thank you very much. spanish giants barcelona have won their fifth trophy. they beat argentina to clinch the f.i.f.a. world cup in yokoham a. >> reporter: the world cup champs for a third time. 2015 has been a fantastic year with the club adding another title after win i

. >> reporter: the proposed cambodia dams are also close to the home of the mekong dolphins.phin population has been in steady decline for years and more recently the rate of decline has fallen thanks to conservation work. the concern is the construction of dams could undo that work. it's thought there are only around 80 left in the mekong and changes to an already fragile eco systems could wipe them out and turning to electricity is essential to help develop economies and alternative argument is the price for that development is too high. wayne hey, al jazeera, cambodia. >>> and in the next of our series rivers of life we will be in nigeria looking at how the worsening state of the country's waterways is having a real impact on people's lives. now christmas can be a really expensive time of the year for many people who are buying gifts and cooking for extended family but in south africa there are saving schemes known as stocks who are taking pressure away from low-income homes and here is tonya page. >> reporter: steak and chops and barbecue is the flavor of the month in thi

dolphin population has beeninsteady decline for years. the rate of decline has fallen. the concern is the construction of dams could undo that work. it's thought there are only around 80 left in the mekonginor changes could wipe them out. harnessing the river and turning it into electricity is said to be essential to development economies. the alternative is that the price is too high. karachi, cambodia. >> in part three of our rivers of life series, mohammed idris looks at the declining fortunates of it nigeria's water wafrmingsz are affecting people's lives. don't miss that. the columbian president has revealed perhaps for how i see government will deal with members of achld forces found to have committed war crimes. saying solids will be subject to former try buenals. a deadline is set to bring an end to the longest running war which has killed 220,000 and displaced 6 million more. >> the treaty will be semit tripping cal in some aspects, different in others, but always equitable, balance and simultaneous. >> means columbian soldiers will never be subject to worse conditions than farc members. >> that's a promise. >> the final t.v. debate, hillary clinton, bernie sanders and martin o