decrease in air pollution. but there s been other studies that looked at a longer period, another group that found 26% reduction in nitrogen dioxide over the year following its introduction. so it s clear that the ultra low emission zone that was established in april 2019 has now been expanded and has reduced air pollution in london. and it s important to note that the air quality in london is still way above the levels recommended by the world health organization, so the air, although it s better than it has been, is still not safe. fin although it s better than it has been, is still not safe.- been, is still not safe. on that issue, been, is still not safe. on that issue. what been, is still not safe. on that issue, what about been, is still not safe. on that issue, what about this - been, is still not safe. on that issue, what about this figure | been, is still not safe. on that i issue, what about this figure that 4000 londoners are dying of air pollution every year? many expe
arms, on the seafloor in its fourth dive. the priority of investigation is to recover items from the seafloor. reporter: the question tonight, could this have been prevented? abc news obtaining foreboding e-mails to ceo stockton rush from karl stanley, a submersibles expert, who in april 2019, went on an experimental dive in the bahamas aboard the doomed titan. but in an e-mail to rush after, he warned of cracking noises that sounded like a flaw defect in one area being acted on by the tremendous pressures and being crushed/damaged. claiming in another e-mail to rush, the fact that you told me to not speak about the noises i heard on the dive, to me, says a lot. i would compare them to small caliber gunshots. i m not i m not a person prone to panic. nobody in that submarine was panicking, stockton, played it cool but it was very disturbing. reporter: rush, on defense,
rising in the uneasy alliance, with both sides clashing over how to restore civilian rule. so how did the struggle for power in sudan begin in 2013? the rsf evolved from the janja weed militia that had earlier fought a rebellion in the darfur region under the authority of then president bashir. it was led by him, meti himself who was implicated in human rights violations and atrocities in 2017, sudan, past alone, legitimizing the rsf as an independent security force. in late 2018 protests started in the northern city in part over the price of bread, and those protests spread rapidly to the capital, hurtem after months of protests in april, 2019 committee turned against bashir and the army ousted him from office. a few months later. the main opposition coalition led by
course that failed ceasefire was supposed to allow for the delivery of urgent humanitarian aid amid food, medical and fuel shortages. so what happens to those people who won t receive that help? yes so the two sides of treated blame for the very quick collapse of this of the fields. you know your monetary in ceasefire. i think we see a very urgent and worrying situation as i mentioned in the middle of sudanese summer, it s you have power cuts. you have water cut off to very many neighborhoods. it s very critical. also to remember that we don t have sight of what s happening outside the capital. you ve had reports of fighting not just in the west indies poor but also in condo fund. get the rift kassala and other areas so i think this really just emphasizes the need to move towards a quick ceasefire if we cast our minds back to april, 2019, we have to remember this was one of the most inspiring
both in the media as well as in the public. but it looks like where the army stands, there is no possibility of talks at the moment, and perhaps some international and regional pressure, there might be some window where the arab league and other actors in the region. is there any sense that you know of of what actually sparked this latest upsurge in violence? because we had been hearing that there had been this framework agreed in terms of this transition to civilian rule, and then this happened. one of the biggest issues with sudan s political reform process since the coup in april 2019 has been the unification of the armed forces, so the integration of the rsf into the army. there have been concerns that having a powerful force outside the national army could lead to various centres of power, as we are seeing now, so this framework agreement, it accelerates that integration over a five or ten year timeline, but then all the parties were pushing for a shorter period of integration, so