time magazine has published a picture of him wearing brownface makeup at a dinner 20 years ago. mr trudeau says he dressed as aladdin for an event with an arabian nights theme — which he says he now recognises was a racist thing to do. he says he should have known better. saudi arabia has produced what it says is wreckage which it claims proves iran was involved in attacks on two of its oil refineries at the weekend. the defence ministry unveiled parts from what it says are drones and cruise missiles. the us secretary of state has suggested the attacks were an act of war. the trump administration says it's revoking california's right to set its own emissions standards on cars. the president claimed the move would allow manufacturers to produce cheaper and safer vehicles. the governor of california said his claim was "factually inaccurate". the state's begun a legal challenge.

you are up—to—date on the headlines. now on bbc news — it's time for click. this week, how to hide in hong kong. a new bunch of apples. and dyeing to save the planet? try green fashion. other colours are available. for the last four months, protesters have been rallying in hong kong. first against a proposed bill that would have allowed the extradition of hong kong residents to the chinese mainland to face criminal trials. that bill has now been withdrawn, but protesters remain on the streets, asking for more

demands to be met, including greater democratic freedoms and an inquiry into alleged police brutality. the protests have been watched around the world, with videos uploaded daily showing highly organised groups. in the airport, on roads, and even in the legislature. but with no clearly structured leadership. this contrasts with the so—called umbrella revolution of 2014, a pro—democracy movement where individual organisers were targeted and jailed. this time, people are using encrypted messaging apps to organise in a more anonymous way and try to avoid interception by the police. china is a world leader

in facial recognition, surveillance, and artificial intelligence technology. so it's not unthinkable that they've found workarounds to keep an eye on the apps. danny vincent is in hong kong and he met two protesters who are trying to organise without being identified. a smart lamppost being kicked to the ground and opened up by protesters. hong kong authorities say they are used for monitoring the weather, pollution and traffic. but protesters say they could have a more sinister purpose — housing a facial recognition camera for monitoring and identifying people taking part in the protests. they sawed it down to see what was inside. they claimed to find computer chips made by a mainland company linked to surveillance. i think the guys in the front line that took down that surveillance camera, they understand it might be a surveillance system

that is monitoring its people. but they actually might not know the entire technology behind it. lasers are another way protesters are using relatively low—tech solutions to disrupt the surveillance of the police en masse. the laser pens are used because if you point it directly at a camera it will make the sensor of the camera a little bit unstable. it might buy time for us, it might disrupt the police from chasing us. hong kong has seen months of protests. these protests have not been organised by individuals. they have been organised by tens of thousands of people online and tens of thousands of people have also taken to the streets. much of the organisation has been done using online forums and encrypted messenger apps like telegram. this it professional and protester asked us to call him tony. he is a member of several groups planning protests over telegram group chats.

some of these groups have tens of thousands of members. the last time hong kong has had such la rge—scale protests was during the occupy central movement or the umbrella revolution. that movement had a leader. the government has targeted that organisation afterwards. so this time around, people see that it's safer to participate in this movement without identifying themselves. without telegram, i can't imagine how the masses would have co—ordinated effectively, feeling secure that the police could not implicate us or prosecute us. some go to even further lengths to protect their digital footprints. meet alex. the phone i use isjust a normal android phone from samsung that has got military—grade security. it works as a secondary android. it is behind the primary android system. it's two separate systems.

there's a lot of passwords you have to input in order to get into that secondary android. it is military—grade protection. it's very difficult for the police to trace me digitally. he suspects the authorities are also becoming increasingly tech savvy. many have long suspected a loophole in the popular messenger app, which could allow the government to monitor communication — despite its encryption. we suspect the government has been importing all the hong kong phone numbers into telegram, or the police force telegram account, to help them pinpoint which person is involved in that kind of speech or involved in that conflict. telegram claims it has now fixed this loophole — but fixed or not, protesters are developing other methods of communication.

these include using airdrop on iphones and the bridgefy app. both work via bluetooth. bridgfy uses peer—to—peer mesh networking and doesn't need the internet to work. still, these apps may not be completely surveillance—free. sometimes face—to—face communication is the only means available. if the internet is not good and it's not feasible for us to grab our phone, it is better to do it in the field. this movement has also become an information war between the protesters and police. protester scouts take photos of police locations and spread the information online. after more than 15 weeks of protests, this movement shows little sign of slowing down. hello, and welcome to the week in tech. it was the week that alibaba founderjack ma retired. he leaves the retail giant china's richest man, worth a reported $38.5 billion.

google was hit by a new anti—trust probe following concerns over its grip on the online advertising market. and apple unveiled its new iphone, which is giving some fans the creeps. more from the launch event in a bit. it was also the week the longest ever road trip by an electric car was completed. suvs from the shanghai carmaker aiways travelled over 15,000 kilometres from china to germany, a journey which lasted for 53 days, called for 77 recharging stops, and resulted in a guinness world record. i hope they took adequate toilet breaks. and sticking with motors, one day you may be able to redecorate your own in a jiffy. thanks to a new colour—changing ink from mit, nicknamed "photochromeleon" after shade—shifting chameleons, this futuristic dye reacts to different lights to produce various hues.

and finally, here is a bright idea for a new breed of bot. the 0scibot is powered and steered by light, thanks to a gel which bends towards and oscillates around sources of illumination. the energy—efficient contraption could one day allow seafaring vessels to travel long distances without any fuel. fingers crossed this flip is not a flop. and so to the stevejobs theatre in cupertino, california, for the apple launch event, where — as expected — the iphone 11 range was announced. these come with multiple cameras. the 11 pro and pro max have three, which sees them catching up with android rivals. what else? better batteries, a slightly bigger ipad, a bit of an upgrade for the watch, and the pricing for apple's new tv streaming service was unveiled, cheaper than netflix at $4.99 per month — that's in dollars

or pounds, though many would argue it needs to be cheaper given the comparative lack of content. the event was titled "by innovation 0nly," but overall there was little to quiet the rumblings over apple's lack of exactly that recently. unless you count slow—mo selfies as the groundbreaking feature the world has been waiting for. dave lee was there for us. first question, most important, slow—mo selfies — why? good question, spence. i think the question for many is "why not?" for people like us with short hair it might not be so good to do a slow, glamorous selfie. but i think there will be the influencers out there who will be very excited by the prospect of having a slow—mo selfie just for that added glamour on instagram. and certainly it doesn't feel like apple is leading the charge these days. i mean, there've been several iphone launches

recently where we've said, you know, they're still playing catch—up with companies like huawei and samsung. i think that's true, but i think that is perhaps how apple has been for some time. it has never really been too much of a problem for them, apart from the initial iphone, which changed everything, everything since then has been kind of iterative. the problem will be that if you're a sort of person who, like most normal people, wants to purchase a phone that lasts three orfour years, the new iphones do not have 5g. many people will look at that and think, i'm going to have 5g. even if i don't have it today, i might have it in a year or two. this phone doesn't have 5g. london fashion week has kicked off with all its usual glitz and glamour, and as the biggest designers take centre stage to showcase their latest creations and set this year's trends, protesters from extinction rebellion gathered outside to remind the world about the true cost of fast fashion. 80 billion pieces of clothing are produced every year. and many of those are discarded not

long after they have been bought. the true cost of fast fashion is now becoming apparent. the industry is one of the largest polluters in the world, right up there with oil and agriculture. and cotton production is a big part of its carbon footprint. almost half of all clothing contains cotton. well, lara lewington has been to sweden to see a facility which is hoping to refashion our cotton garments several times over. from the cotton fields to the clothes rail, it takes 20,000 litres of water to makejust one kilogram of cotton. and to put that into context, that is enough for a t—shirt and a pairofjeans. and that is why what is going

on here is so important. at this swedish recycling mill, a fifth of that water is needed to create a comparable amount of fabric. the place runs on wind and water power, converting cotton into viscose in a process classed as climate positive. these bales are stacked full of denim, in this case leg panels from pairs of jeans. so although this facility could separate any metal fastening or even any stitching which is made out of something that isn't cotton, here this batch has arrived all sorted already. but here, an eco—friendly chemical process is followed by de—dyeing the fabric. any remaining colour is then removed through chlorine—free bleaching. water then transports this pulp into the next stage, where it will be dried for transportation. resulting in quite literally a blank canvas to be sold on to clothing companies.

and this is the end result. a sheet of what is known as circulose, a type of dissolving pulp. that gets sold on and turned into thread which feels a bit like cotton wool, and from there of course it is used to make clothes. feels pretty nice. that is now made out of viscose and it is recyclable again, about five or six times. this was in fact a proof of concept seen on the catwalk a few years back. this was in 2014. four years down the line, this facility was ready to be opened. we can produce 7000 tons per year, annually, of this dissolving pulp, and that equals the weight of 30 million t—shirts. we are the first company which is doing this on an industrial scale.

we are notjust producing kilos, we are producing tons of this, and that is very, very important for the industry, to realise that this can be done on a real scale, and make a real difference. because if you just talk about kilos, nobody can make a change with a few kilos, but you can make a change with thousands of tons of material, and you can show the world that it is actually working. raw materials being sorted is just one piece of the puzzle, though. this denim had to be shipped from the us, although with scale, more facilities could open worldwide, reducing the carbon footprint of that element. and how about the labour afterwards? that is not in renewcell‘s remit, but it is of course part of the bigger picture.

in the meantime, high street retailer h&m, one investor in the company, will soon have clothing originating from this process on their shop floors. but the big dream here is that by 2030 the clothing industry might use 100% recycled or sustainably sourced materials. and while that may sound unachievable now, clearly times and attitudes are changing. that was lara in sweden. so recycling raw materials will undoubtedly be part of a greener future for the fashion industry. but in the meantime, how about this? it looks and feels like a thin cotton t—shirt, but this is actually made from algae and wood pulp. the print is 100% algae, and the material is made of lyocell from trees and linen from plants.

pretty comfortable, i have to say. the care instructions are a little bit fiddly — basically keep it cold and don't iron the algae. but the most interesting thing is, when you have finished with it and you want to get rid of it, you can bury it in the garden and it will be gone within three months. but something that is even more harmful to the environment than growing cotton is dyeing textiles. half a trillion gallons of fresh water are used in textile dyeing each year. the untreated wastewater from the dye is often discharged into rivers, leaving entire communities with no access to clean water, killing aquatic life, and eventually reaching the sea. and get this — it can take about 150 litres of water to dye just 1 kilogram of cotton. well, lj rich has visited a lab in london which is only using 200

millilitres of water to dye a 1 kilogram piece of silk. so what's the secret? this lab houses a fashion scientist who uses petri dishes to make colouring clothing more environmentally friendly. this could be the future of fashion — and it smells like beetroot. these beautiful designs were created by bacterial activity, no chemicals required. so how did you come across using bacteria to dye clothing? so when i was studying material futures at saint martins, i met professorjohn ward here at ucl, and he introduced me to a bacterium called streptomyces coelicolor. depending on how it is grown, where it's grown, the ph of that environment, we can produce something like a navy blue, a bright pink, and so we use all of these conditions as a design toolkit to influence our patterns and outcomes on the textile.

the bacterium ferments in a small amount of sugar solution, which produces pigment directly onto fabric as the colony of microorganisms grow. like a brewery with yeast, natsai engineers the growing conditions to produce different varieties of colour. i am really interested in how technology is changing how we design and fabricate our environments, and especially in the context of climate change and the source of our resources and the impact they have on the environment. so the imperative for us right now is to try and find ways to change the way in which we process and manufacture textiles, reduce water use, do away with the need for chemicals at the beginning, at the end of the stage. the process is simple enough that even i could get a start on creating my own microscopic civilisation. so satisfying! she laughs.

ok, that's you. wow! there you go, my first... what would this be, a kind of culture? it is a cell culture. we are going to ferment this now for approximately seven days. right. and we should, at the end of it, have something that looks a little bit more like this. it is a slow and thoughtful process. it takes a week for the bacteria to transform plain fabric into a kaleidoscope of colours, and it works — on a small scale. i think the challenges are to then take it from a lab scale, and then develop that into really la rge—scale processes that both work efficiently, but also at the right kind of cost. as well as these unique organic patterns, the technique could also block dye fabric a uniform colour. but could these tiny microorganisms make a big enough impact

on an industrial level? i am all for it, the innovative element that we are exploring, i think it is vital, it is crucial, but it has to happen in parallel with behavioural change. should we be consuming as much as we are consuming? perhaps not. i think for us it is a two—pronged approach. and this might help the fashion industry start to get a bit more down—to—earth. brilliant, that was lj. meanwhile, i am visiting london college of fashion to see a very strange catwalk. i am looking at three identical ladies, each one is sporting a different piece of streetwear. and it really feels like they are in the room with me. i am wearing the magic leap mixed reality goggles, which overlay computer images

onto the real world. the college wanted to explore how we might one day use mixed reality to enhance our online shopping experiences, and this app was the result. this really is so much better than looking at photos of clothing on a website. you really get a sense for how the material hangs and the quality of the fabric. return rates for online shopping are over 60%, so the possibility of trying clothes on virtually before you physically have to do that will make a huge difference to consumer experience. this could certainly be a better way for shopping for clothes online — of course, what would be good is if it wasn't an avatar of martina here wearing the clothes, but an avatar of me. which is why i find myself wearing my brightest and tightest clothes, while my curves are being scanned by a phone.

capturing 3d content for fashion in the past was either incredibly difficult, with hours spent in front of a computer 3d modelling, or very expensive using vast camera arrays. what we are beginning to get towards is the possibility of capturing photorealistic avatars through a smartphone. you do still have to stand absolutely still for several minutes — all the time remembering what my mum used to say, blue and green should never be seen. and there is several hours of processing online, but finally, here i am! the same method is also used to capture clothing items. the idea is that clothing companies will scan all their garments in all different sizes, which you can then pop onto your digital double. the team here think this application will go far beyond online shopping.

they are looking to a time when we will all have a presence in the digital world, and will want our avatars to meet each other looking their best. and not only might there be a market for these completely virtual outfits, one day we might also be able to augment our actual clothes back in the real world. we truly believe in what is called the ar cloud, is a digital layer across the real world, where there will be different experiences that you can begin to have, and one of those will be fashion. there will be digital clothing, and certainly from smartphones, we are able to have depth sensors, track the body to a much more accurate level, the possibility that we can overlay digital garments on to what we are currently wearing is absolutely realistic and we believe it will happen.

and those who would like to see me in the hoodie in next week's programme, vote now — youtube, facebook, instagram and twitter. whispers: it's not going to happen. that's it for now, thanks for watching and we will see you soon. hello. thursday morning brings another rather chilly start. but actually, the emphasis over the next few days is for things to turn a little warmer and, with that, for the vast majority, it will be dry. high pressure firmly in charge at the moment, centred right on top of the british isles for thursday morning. one or two fog patches underneath this high, with light winds, and one frontal

system bringing some extra cloud and the odd spot of rain in the far north of scotland. that's where we'll have the mildest weather through the first part of the morning. further south, one or two spots down around to three or four degrees in the countryside. but across england and wales, we will see plenty of sunshine, once any early fog patches have cleared from the likes of north—west england. some early fog across parts of northern ireland but, again, some sunshine to come here. where we start off cloudy in scotland, that cloud should break to give some spells of sunshine. there could be some areas of cloud then lapping into east anglia and the south—east through the afternoon. but generally speaking, a dry day for most, and a slightly warmer one as well, with highs of 17—22 degrees. it stays fine as we go through thursday night, the cloud continuing to peel away from scotland. the winds picking up, though, across western areas. so no realfog problems, i suspect, across the western side of the uk. certainly not much fog affecting northern ireland. slightly milder in the west, as well. but further east, some rather chilly weather to start friday morning, and the fog risk really pushing its way into south—east

scotland and north—east england. but any of that fog will lift. we'll see some areas cloud drifting northwards through the day but, generally, it's another fine day with quite a lot of sunshine. and again, it will be a little bit warmer, widely 19 to 21 degrees. but, somewhere in north—east scotland, we could get all the way up to 24 degrees. and saturday looks warmer still. a feed of very warm air wafting up from the south. relatively humid air as well. and then, as we go through the weekend, we will turn our attention to the west, because these frontal systems will be trying to make some inroads. for the majority, on saturday, we get away with a dry day, with quite a lot of sunshine. it will be quite breezy, but there is just the hint there of a shower across the south—west of england. could see some of these into wales, northern ireland as well, late in the day. could be the odd thunderstorm, and some hefty downpours as well. but i think saturday the warmest day generally. 21 degrees in glasgow. 25 or 26 towards the south—east. some uncertainty about this, but on sunday it looks

like we will see showers and thunderstorms becoming more widespread. but there are some doubts aboutjust how far north and east they will push. some spells of sunshine as well, but it will start to turn cooler and fresher from the west.

this is bbc news. welcome if you're watching here in the uk, on pbs in america or around the globe. i'm mike embley. our top stories: canada's prime minister justin trudeau apologises after time magazine uncovers a picture of him wearing brownface make—up at a party 20 years ago. i dressed up in an aladdin costume and put make up on. i shouldn't have done that. i should have known better, but i didn't. and i'm really sorry. the us secretary of state describes the attack on saudi oil facilities as an "act of war" — and again blames iran. european union chiefs give borisjohnson two weeks to set out his brexit plans — if he doesn't, they say, "then it's over".