this is bbc news. we will have the headlines and hours straight after this programme. this week, more clean, green fun in the sun, with battery robots, solar cars and electric boats.

in an unassuming garage in the netherlands, there's an electric car with a secret. no, it's not its ultra—light, ultra—strong carbon—fibre frame, although that is important to the story, and it's not the aerodynamic design that makes it look like a future car from the 1950s, although that is important too. no. look closer at that shiny finish, and you'll see that it's not paint. the entire thing is covered in solar panels — solar panels on the bonnet, solar panels on the roof, solar panels instead of a back window. yes, this is a solar—powered car, and they call it lightyear one. the first production model will be going on sale this summer. its five square metres of solar panels come in narrow sections that better curve around the body and also mean that if it's parked partly in the shade, the sections that

are in the sun still work at full capacity. but even though the battery can take you 440 miles on a single charge, a day's worth of sunlight will only provide about 45 miles of that. the rest still has to come from plugging it in. however, 45 miles might be enough to get you to work and back. you can fast—charge it using a normal charger, but the solar panel will recharge your commute every day. so, basically, when you put it outside of your office space, then it recharges itself, and when you get back, the car is full again. and, basically, that happens every day. in the summer in the netherlands, you wouldn't have to charge for months if you do just your commute. really! i'm from the uk — i know what you're talking about, yeah. yeah. and, basically, uk and the netherlands are the worst i%, right? it will get a lot better when you go to south europe.

why did you set up a company here, then, and not in the sahara? because we love the sun because we see it so less. actually, the netherlands is a european leader in solar power, getting as much as i7% of its energy from the sun. lex is a bit of a world leader, too. in 2012, he co—founded the team that went on to win the solar challenge cruiser race across the australian outback four times in a row. unsurprisingly, the design of lightyear one is somewhat more conventional. now, solar cells are getting better and better at turning sunlight into electricity, but lex's company is more focused on making what energy it can harvest go further. the result will be the most energy—efficient five—seater on the market when it launches, with a ruthlessly aerodynamic design weighing about half a tesla model s, and which trades the crazy acceleration of that beast for range and efficiency.

so, the tendency has been for electric cars to look at high acceleration and large batteries. so, because of those two, cars get very heavy, and very heavy cars that accelerate quickly, they need very high power. so, we say it's more important to get to the destination quick than it is to be quick at a traffic light. and what's great about in—wheel motors is that they are direct drive, so, basically, there's no gears at all. there's just four moving parts — four motors. that's it. so, it means that no heat is lost in drive shafts or other gears, etc. so, every bit of energy goes directly to the motors and to the wheels. and that makes it more efficient and therefore on the same amount of solar you get in, you can drive more. now, lightyear 0ne isn't the only solar—powered car being developed. this one, from german outfit, sono, is due to hit the market in 2023. and, look, of course it makes sense to get your electricity free of charge from the sun, rather than from fossil—fuelled power stations. but solar cars also come with new challenges. for a start, you're going

to need to keep it clean to maximise charging. and you know those stone chips you get in your windscreen? well, now, much more of the car is covered in glass, although lightyear does say that any chips can be filled with resin in the same way as windscreens. it does seem like it's been a long time coming, but looking at this, it is a bit easier to believe that one day your car might be wearing a sea of solar cells. but you know, lara, it is slightly depressing that even with a highly efficient body, it's those solar panels that need to get more efficient if we're to run completely on solar in future. yes. maybe for now we need to focus on getting more power into batteries quicker. that's a nice idea but it is hard. can i show you something that might help? uh-huh. well, here's a british company hoping it's solved the fast—charging challenge. the nyobolt cell is the same size and weight as a traditional lithium ion

one but it can power things better while it's doing thejob, and, crucially, it charges a lot faster. the eventual aim? three minutes compared to three hours, and here in this lab, batteries are being tested along with visualisations of their charging speed, heating and the current. the cells are then grouped together and tested in regular devices. it's possible to charge batteries in five minutes. we have had robotic vacuum cleaners charge in three minutes. it's possible to charge power tools in ten minutes or less. much of the success here lies in the development of a new material which allows lithium ions to transfer quickly at a safe temperature. the heating you get primarily. because your anode and cathode materials are not able to move lithium ions fast enough - and then the heating causes . a whole series of degradation, electrolyte decomposes, i the cathode decomposes, giving off oxygen -

and that causes fires. but even having addressed this, there are still challenges for the fast charging of the thing many of us care about the most, our smartphones. years of miniaturising their subsequent growing screen sizes has made this more difficult. these limitations come from the components, so the wires and connectors, and are usually limited to five amps, that is what you have in most usb sockets so the usb—c has to go to its next generation. that can allow faster charging and you need chargers that wouldn't become too big and bulky to carry around. vehicle charging is on the agenda as well. when it comes to recharging electric vehicles, there are a lot of variables.

this isn't exactly your standard electric car. right now, to fully power up something like this would take about three hours. now, that's partly because the initial bit of that charging happens quite fast and then it slows down later, but these batteries should overcome that problem, making it possible to reach full charge in just five or six minutes. driverless taxi pods could spend more time shuttling people, rather than sitting charging. the company's also been working on this prototype mobile charging device. the idea is it could be used on building sites or maybe to even charge cars. it can move forwards and backwards, from side to side here you've got three detachable batteries. they only take three minutes to charge and there are also ac sockets, and thanks to 2,000 cells inside it can provide 30 kilowatts of power, about the same as a tesla power wall. there are still other issues to be overcome. what happens to the battery at the end of its life? and there are compromises.

if you don't mind an additional 10% or 20% lower run time but can get all that energy in five minutes, this is something our technology allows. 0nce lab trials are finished it will be time for industrial testing and validation in the hope these fast charging batteries could be speeding up our lives in the next few yea rs. hello and welcome to the week in tech. it was the week nintendo announced the breath of the wild sequel is delayed until 2023. elon musk says he's thinking of building a new social media platform that is open source and supports cryptocurrencies, and tiktok announced a new in—app creation tool, called library, with select content from giphy, the source of many gifs and animated

stickers. it aims to encourage more entertainment content and take part in trends. the pompeii archaeological site is using a spot robot dog to explore the ancient ruins, collect data and assess structural issues. authorities are also using laser scanning drones to help create 3d models of the site. as part of its move towards net zero, the government in britain has ordered research to begin on orbital solar farms. proponents of solar power in this form believe they can provide round—the—clock renewable energy that's wirelessly beamed to earth and fed into the grid. and finally, dyson have announced the launch of their new noise—cancelling headphones that come with a built—in air purifier. the company claim the cans can deliver a continuous stream of clean air without touching the wearer's face. you heard it �*ere first.

this is greenwich naval college in london. with its brand—new cycle way, play area, benches and bike park. it's an urban regeneration that didn't need council approval — in fact, it was only completed about ten minutes ago. yeah, it's a visualisation of how things could be, the kind of thing you see skilled urban designers make, although this is betastreets, a tool that can be used by anyone. quite often the visualisation can be done at the end of hundreds of thousands of pounds of design work and then the decision—makers decide they don't like it, and therein lies a problem because a lot of money and time has been spent getting there. we've deliberately kept betastreets as a simple tool for most people and not something you need to work in street design for two years

to be able to do. the idea is anyone can take a photo of their local area, upload it to betastreets and the software will do the work for you. this tool analyses the photo to work out the geometry of the image, and that makes adding street furniture, cycle lanes and trees a doddle. is that a sensible place to put a bike hangar? laughter. that's a no, then. this is chaos. you do not want someone like me having a go at your street. let's put a slide here over the kerb so you can climb up there and then slide down onto the red bit of the road. have you got flumes? that's something we could add in. i can see the shadows of the tree tracing across the bench. 3d gaming engines, like unity and unreal engine, take care of the visuals, allowing objects and lighting to be easily manipulated and opening up a previously highly skilled profession to many more people. they have been around

a while but it's more that people's computers can now handle what we are giving it. i mean, this is fun. it's a disaster, for me, and for everyone that lives down that street, but it's fun, so i can kind of see how people would actually engage with this. it's incredibly easy, and that's the first time you have used it and ok, you have made a bit of a mess but it looks. . .semi—believable. whether or not you would put those objects there... it looks... longest pause in the history of television. ..believable! the system was used by the charity london cycling campaign to start a conversation about making london's streets greener and more cycle—friendly. not sure i'd want to have a conversation with the residents of this street. think i will leave it to the professionals. because this tool runs in a browser it's fairly easy to make it run on a tablet

or phone, which means you can take the photo you need and then stand on the street corner and do your sketch there and then. different cities will require different solutions in their quest to become sustainable so let's go somewhere completely different. i'm going to hand you over to captain lewington. it's icy out there. it's very, very icy. with 3,000 kilometres of coastline and nearly 300,000 islands, sweden plays host to a variety of sailing vessels. motor boats use fuel that create greenhouse gases. they can leak petrol and they can cause noise pollution. so, i'm here to take a look at some electric boats that aim to overcome these problems, including one that doesn't cut through the waves, but glides above them.

right, i'm following you. yes, come. under this 25—foot craft is a wing for hydroplaning and sensors that collect hundreds of data points every second. you'll have to take the passenger seat first. 0k. and then we'll let you drive. we need to stabilise it, much like a fighterjet. then we feel how we're oriented, where we are in the world, and then about 100 times per second, we are adjustable by twisting it and changing the angle to keep stable. this is where it gets exciting. let's go. wow! i can feel the sensation of the boat lifting up. it does actually feel like we're flying. and without the hull in the water, it's using 80% less power than a boat would conventionally need.

batteries are still no way close to the same energy density as gasoline. but as hydroplaning reduces friction, electric becomes a more viable energy choice. this feels beautiful. whilst most electric boats eat up more energy the faster they go, this consumes the same at five knots that it does at 20. on a full charge, it can hydroplane for two hours, covering 50 nautical miles at a sensible 20—knot cruising speed. and we can have a conversation like this. it's not like it's slamming in the waves. which is very sociable, and it also feels very smooth, like an electric car. you want to try it? i'd love to. ok, let's do it. apparently this is easy, and when i raced a tesla a little while ago and beat the race driver that was way easier than i was expecting so let's do this. seat belt on, everybody! seat belts on. i took to this

like a duck to water. well, after a few big unplanned splashes. ok, that feels faster than you went. ok, now pull it down a bit. 0k, pull it down a bit. i'm heading for the big waves. whoa — whoa! that was amazing! good work! i barely felt those. a very different experience to our producer's boat. thank you for the warning! it's a leader amongst its electric peers, but i do wonder if prices — starting from around $300,000 — might stall adoption, especially when similar—sized motorboats can still travel several times further and go around ten knots faster. of course, there's going to be

petrol—powered boats for quite some time, but, i mean, once you try this kind of experience, it's quite easy to imagine everyone driving like this. yeah. and when you're here, looking at this beautiful water and the beautiful scenery, it feels good to know that you're not damaging the environment whilst you're out. 0n land, bigger crafts are under way, with a 40—foot public shuttle set to launch with the city of stockholm next year. this is our first electric hydrofoiling ferry. this one will be able to carry 30 passengers. and it's exactly the same technology, just scaled up? exactly. it's the same concept. but next for me is another swedish company called x shore that's making electric boats better connected. hey! hello. nice boat. thank you, thank you. she's a beauty. i believe you have something to give me before we get on board. i have. so, you will be able to start the boat with this one. garmin�*s gps and vitals—tracking smartwatch comes with added nauticalfunctions. man overboard on, unlocked.

and then if you fall in, then it stops. now, this won't be as energy—efficient as hydroplaning, but it's still powerful. in four seconds, we will be up well above 30 knots, so everyone needs to hold on. is everyone ready? yes. give her everything you got. just full throttle. laughter yep, i'm flooring it. it's similar to candela in cost and top speeds, but can cruise slowly for double the time. as it sails, the vessel collects 150 data points each second. everything is shared back to h0 to optimise performance, but with private info being beamed straight from my wrist, i was curious about security. technically, you can hack the pentagon, right? so, you can probably hack our boat, if you're that

good, but we have the same kind of security layer as any car company. just like connected cars share data to improve urban spaces, smart boats could help local authorities improve life at sea. so, this is our r&d lab. so, this information like water quality and water temperature... mm—hm. ..you can't do anything about it. no. so, how much use is that data? for the cities, it's lots of use because they can see if the temperature suddenly rises, where to go swim, where to avoid, if you have coral reef areas. i mean, this is something that our customers would want to monitor, actually. with remote—control tools built in, floating sea labs could one day operate themselves. are you working towards these becoming autonomous? yes, we are. when? in a few years' time. a few years. that was great fun but it's not just about that.

90% of the world's trade is shipped and that accounts for 3% of all co2 emissions. going electric could be one solution but another is using sailboats, and one company has been trying to bring that idea into the future. with world trade growing, it's important we do something to reduce co2 emissions by up to 40% by 2030. we are using wind. this is where you get the different, runs, where you have the most power, that is where you have an aeroplane wing that can be put up the ship. measuring the flow that is actually clear is really difficult. this vessel here is seven metres long, mainly made out of glass fibre. the full—scale ship will be

around 200 metres long, roughly 80 metres in height and the mission is this would sail at the end of 2025 or early 2026. what makes wind really interesting, it's of course free of charge, we know there will be wind in the future. up there you will have very little disturbance. it has been a lot of learnings. we have roughly around 150 sensors measuring up to 200 data points every ten seconds, pressure, wind speed and also the direction of the ship. when you change the angle of attack, that will be a big difference in how you can optimise the hull, how you can optimise routing, how you can optimise wind sails and combining that will bring us up to 90% c02 reduction. there are unexpected things going on. one example, when the wings

are flipping over there and it also starts to move backwards, so these are things we have learned and then look into how we can work on that to make sure you avoid this going forward. when it comes to the full systems over the atlantic ocean you will have very good solid wind more or less all the time. if you get closer to the equator you will have less wind where you need to put in some other kind of energy. it could be a wind assist for you just to reduce c02 emissions from the main engine. you also need a back—up system in case you have no wind. taking new steps will be a challenge. the shipping industry has been going on for the last 100 years. what we can show as if this is a profitable way of going forward and also a very environmentally friendly way, that would make it super interesting for all ship owners in the world.

that was nicholas zull finishing off the sustainable journey by road and water on what turns out to be click�*s 22nd birthday, would you believe? now, we're making a few changes behind the scenes here on the programme, so while we get things sorted, we're going to treat you over the next few weeks to a few of our favourite programmes from the last few months. do enjoy those. we'll still be on social media. you'll still find us hanging out on the socials — on youtube, facebook, instagram and twitter at @bbcclick. thanks for watching, and we'll be back soon. hello, there. there was a lot of late

august sunshine to be found on tuesday. it was a beautiful day across much of scotland, as you can see from highland, but here, temperatures sat in the high teens, low 20s. now, further south and east of that, again, lots of sunshine, but it was hot and it was humid with it. in fact, suffolk saw the highest temperature on tuesday afternoon of 29 celsius. as we move into wednesday, this weather front will produce some rain, but it's also the dividing line between fresher air to the north and west and somewhat humid conditions continuing across much of central and eastern england. so, yes, we will see some rain, some of it heavy at times across west wales and then gradually pushing into north west england. a few isolated showers further north and west, but here it will be predominantly dry, breezy as we go through the day, but those temperatures once again sitting in the high teens, maybe low 20s. to the south and east of that weather front, our temperatures again on the high side, 25—30 degrees, and it will be very humid with it as well. now, as we move through wednesday evening, into the early hours of thursday morning, our weather front doesn't

move very far very fast, and when it does so, it will weaken off considerably. so a band of cloud and a few patchy showers moving across the pennines, but to the south and east of that, there's a risk of some thundery downpours developing in the south—east. and with the temperatures staying on the high side, 17 or 18 degrees, some of those showers really could turn quite heavy and thundery. so during the early hours of thursday morning, we could see across essex, kent, suffolk and maybe north norfolk some sharp showers drifting their way steadily eastwards. they will be fairly isolated and only on those eastern fringes, but any rain in these areas is certainly going to come as welcome news. cloudy skies following on behind, brighter skies behind, with a scattering of showers in the far north—west. noticeably fresher for all — 15—24 degrees the high as we move out of thursday. now, friday, into the start of the weekend, sees a weather front push into the far north—west and the wind

direction changing. so it looks likely that the far north could stay cloudy with outbreaks of rain at times, potentially. elsewhere — and, yes, it's a bank holiday for northern ireland, england and wales — dry, settled but fresher.

welcome to bbc news. i'm david willis. our top stories — twitter�*s former security chief says users' personal data has been put at risk — along with us national security. the company denies the allegations. the united states orders its citizens to leave ukraine — as kiev prepares for heightened attacks from russia, on its independence day. a key day of primaries in several us states — that could set the tone for november's mid—term elections. we'll be live in florida with the latest. days after deflecting accusations of an excessive party lifestyle, the finnish prime minister apologises for an "inappropriate" photo of guests at her official residence. amazing new pictures

ofjupiter, that scientists say can tell us more about the inner life of the planet.