also out of the water, which means he gets pretty much steady shots of us too. i mean, look at martin, he's having the time of his life out there. but whereas the c—8 speed boat is built for pleasure, leisure, and basically showing off, the p—12 ferry is being pitched as a way to make waterborne public transport competitive again, both in fuel costs and in environmental costs too — because as well as not feeling the waves, it doesn't make them either. and that's what this boat is having to do. it's having to adjust its position hundreds of times a second to keep it perfectly balanced. you couldn't do that manually. so this thing is covered in sensors that monitor exactly what its orientation is. and then the computers are doing that compensation. and they do that by adjusting the angle of the wings in the water, again hundreds of times a second,

to keep it perfectly balanced. why has nobody made an electric hydrofoil flying ferry before? i think the main reason is that it's freaking hard. spencer laughs. over 70 countries have commitments to net zero targets. some are enshrined in law. others are goals laid out in policy. large companies have also made net zero pledges. but how do we know that they're being met? well, there's one company that might have the answer. satellites have been capturing images from space for decades. this is a radar one here. you've also got optical images like these. any cloud cover around and you won't see what's going on beneath. and you need daylight

for most of these. but satellite vu has a different plan. for them, it's all about thermal imaging. engines at full power. and liftoff of transporter a. go falcon, go transporter. its first satellite, hotsat 1, was launched injune on a spacex rocket flying out of california. it started sending back high resolution images to earth, its thermal sensors enabling it to trace hot and cold features down to 3.5m accuracy. under that circle, there's a lot more than 4km. yeah. it's the culmination of years of work. we have satellite vu, the world's thermometer. literally, these are the raw images. we think we can make them a lot better. but, here, the first image we ever took was of rome. and you can see that the hot areas

are in the brighter colours and the blue areas are the cooler areas of the city. this one's taken at night. and so what you can see right here is the vatican, it is very, very hot. 0k. so that building, this summer, where you remember there were big heatwaves, absorbed a lot of energy, and at night it's radiating it. hotsat 1's heat maps which are still images and short videos, could have wide application but are particularly useful in climate related matters. we think every city will want this. there's a new city managers called, uh, chief heat officers, and there's seven of them appointed around the world. and one is in athens, for example. and they are wanting this data so they can go and help keep the city cooler, to keep the stress on people less and save energy. but the bigger picture is to help monitor how companies are meeting their net zero commitments.

you can look at oil storage, for example, and see how much fossil fuels are being burnt and how much are being pumped. so when people are declaring net zero or they're reducing the oil consumption, we can come and verify that that's actually occurring. 60 organisations are currently playing around with these early heat map images to see if they can be used to improve their existing climate models. if we're striving to help the planet, if we're striving to get to net zero, you need this transparency of information, and we've done it. in the race to reduce emissions, plans to build wind farms are skyrocketing. but while the electricity that they generate is clean, the green industry has a waste problem. and now the race is on to try and solve that, as adrienne murray has been finding out. these towering machines are getting ever more powerful.

nowhere is that more on show than at this test centre in northern denmark. it is the latest and biggest turbines that they have, the prototypes. this is like seeing and testing the future right here. the largest, a staggering 280m high, has broken world records for the most power. and experts say they're only getting bigger. this race towards bigger and bigger turbines will continue for a while more. we are looking into the possibility of creating a new test centre in denmark, and the design turbine we are designing for is 450m from ground to highest tip. by 2030, wind power could supply a fifth of the world's electricity. we need clean energy, but this green industry has a growing headache when it comes to waste. turbines are built to withstand the forces of nature.

they're flexible, light and...super strong. but that's also where the problem lies. when they reach the end of life, they're really hard to recycle. while the steel in the towers can be reused, the massive blades are almost indestructible. and as older models are replaced, many get dumped in landfill. by 2050, there could be 43 million tonnes of redundant blades globally that need to be dealt with. it is problematic, because we want the renewable energy to be truly sustainable, and if you have a waste material that goes to landfill, it's not truly sustainable. it's a problem players have been scrambling to figure out. and we might now have some answers. there have been creative ways of reusing wind—turbine blades,

it manufactures some of the world's biggest blades at its site here in aalborg. and while this one looks like any other, it can be recycled. it all comes down to a resin called epoxy, which acts like a really strong super glue, binding together the fibreglass. usually, this is incredibly tough to break down, but not here. we changed something in the backbone of the chemistry. this blade has actually gone through our recycling process. and we just turned it around. here you can see all the different glass layers that were placed during the production of the blade and how they are separating from the blade. to do that, it needs to be soaked in a big bath of mild acetic acid. after a few hours and 80 degrees celsius, then you get the result that you see here. so it's just like vinegar in a supermarket? exactly. exactly like you would make pickles or descale your coffee pot. i can actually smell that. there is a scent of vinegar coming from the blade.

this won't tackle today's waste, but when these blades retire, the materials could go into making other things. it could be furniture, suitcases, you could use it for surfboard manufacturing. ok, yeah! so in general, consumer goods. but not. . . new turbines. not as it is right now, but i'm never going to say never. even more sustainability stories in the full—length version which even more sustainability stories in the full—length version which you can find on the iplayer right now. but from sweden, from the new electric barry, thanks for watching and i wonder what this does...

many of you will have had a dry day of weather on friday with plenty of sunshine around. blue skies like these pretty commonplace across the country. however, it certainly was quite chilly, wasn't it? temperatures on thursday reached 15 degrees, well above average, but compared with that for some, temperatures were seven degrees lower on friday and actually quite a bit below average for the time of year. now, what followed from that sunny day is these clear skies which took us into the first part of the night. temperatures have been dropping like a stone and already are well below freezing in many areas underneath these clear skies. the exception to that really cold theme is across northern and eastern scotland on the eastern side of england, where there's a bit of a breeze around and that might just keep the frost at bay. however i think in the very coldest areas in the countryside, we could see temperatures as low as minus six. that's potentially even the case across our very coldest areas of southern england. so a freezing cold start to the day on saturday,

but your weekend getting off to a sunny start as well. and for most, that's the way the weather's going to stay all day. just blue skies and sunshine overhead with barely a cloud in the sky. the exceptions again, northern and eastern scotland down the eastern side of england, there'lljust be a few showers, which occasionally could graze some of our coastal areas, but otherwise it's dry and it's cold with temperatures typically between about five and seven degrees celsius. we are going to see some changes in the weather picture as we head though into the second part of the weekend as this area of low pressure moves in off the atlantic. a cold and frosty start to the day. and as this cloud comes over the top of that really cold air nearthe surface, it's going to be one of those days where temperatures are very slow to rise, and actually most of the day it will stay really, really cold. for scotland and a good part of eastern england, should stay dry with sunshine for most of the day, but out west you'll see some thicker cloud working in. a bit of damp weather for northern ireland, wales and western england, and eventually you might see temperatures climb to about 9—11 degrees,

but really late in the day. the area of low pressure then pushes eastwards sunday night, bringing some rain. that clears off into the continent, as it does so, it will shove back our way some cold air that originates from europe and scandinavia. so next week it stays very cold. into that cold air, occasionally there'll be some weather systems, probably mostly bringing outbreaks of rain, but i can't completely rule out a few flakes of snow as well.

live from washington. this is bbc news. cheering 2a hostages released by hamas have now returned to israel including four children and an 85—year—old woman. meanwhile, more aid is making its way into gaza with 137 trucks entering with medical supplies, fuel and food. as people gather indoors for the holidays, a warning from the cdc saying vaccination rates in the us are not good enough.

hello, i'm caitriona perry. you're most welcome. twenty—four hostages have been released by hamas and are now back in israel. they are reportedly all in good health after initial checks at an israeli airbase. among them 10 thais nationals, one filipino and 13 israeli women and children. in this programme, we'll bring you some of their stories. they made their way to egypt through the rafah crossing in southern gaza, and then, onto israel. over the next few days, a total of 50 israeli hostages are expected to be released as part of the deal, allowing the pause in the fighting to continue. in return, over in ramallah in the west bank, 39 women and teenage boys held by israel were released. in the coming days 150 palestinians are set to be freed. this is scene in gaza right now, where the ceasefire appears to be holding with much—needed aid arriving, throughout the first day of the temporary truce. gaza's hamas—run health ministry says more than 14,000 people have been killed during israeli bombardments.

a military offensive that began, after 1,200 people