this is bbc news, the headlines... russian opposition leader, alexei navalny, has been driven out of hospital in siberia and is expected to be flown to germany for treatment. he's remains seriously ill in a coma. there are claims he was poisoned. the governor of california says lightning strikes over the past 2a hours have sparked several hundred more wildfires in the region. some of the fires are the biggest recorded in the state. 12,000 firefighters are fighting the blazes, and more than 100,000 people have been evacuated. thousands of british holiday—makers are racing to get back to the uk before new government coronavirus quarantine restrictions come into force. in a few hours‘ time, anyone returning from croatia, austria, or trinidad and tobago, will have to self—isolate for two weeks because of a rise in infections. now on bbc news, it's click.

from a battery mountain to sucking carbon out of the air, this week, click looks at some of our favourite sustainable tech from the recent past. this week — a mountain of energy, a solar sea, and some rather unusual food. if you look at the amount of energy we use, we use about half the energy. if you look at the emissions that we provide, we're about 90% fewer emissions, right? and then lastly, on land, and this is a really important one for the farmer, we use 93% less land. so if you're a farmer and you have 100 acres, you can now grow on seven acres hey, welcome to click. what you used to use hope you're doing 0k. all 100 for. there is still one major i don't know about you, drawback for your average but this year has felt meat—loving family. really quite long so far. where a pack of fresh beef burgers might be priced around £11.40 per kilogram, we live in a world the beyond meat alternative which is unrecognisable is currently around £24 from even six months ago. for the same weight. this burger substitute is 100% vegan. but while vegetable substitutes and it's clear that we still struggle to recreate the effect of meat, there is one company have big problems to face. who have decided to but let's not forget the global just grow it in a lab.

issues that we were talking aleph farms are creating what's known as cultured about even before the pandemic, meat, which is grown using animal cells. particularly climate change. this meat doesn't fill up any agricultural land with gas—emitting livestock, now, possibly one silver and no animals need lining from all this to be slaughtered. we use less resources, is the reminder that tech can — less input to feed the cells and does — solve some than needed to feed the animal. but also addressing the issues of our biggest problems. of animal welfare, the issues of the use of antibiotics, and on click, we've been which is one of the key lucky enough to see drivers for developing some amazing tech — the superbugs, meaning tech that can change resistance to antibiotics. the world, and, yeah, the potential for creating a more sustainable way even revolutionise it — to feed the planet is huge. but again, the price, at around so we thought we'd share £2,000 per kilogram right now, with you some of our favourites puts this way outside regular household food budgets. from the past couple of years. what am i having today? today, you're having our dogless hotdog. a dogless hotdog ? and we start, where we use carrots instead of sausages. 0k. which we have poached in a mixture of apple juice and carrot juice. else, but in wales? and then we have dried them in the oven for about one and a half hours, so they shrink in, the beautiful welsh and they get, like, this chewy countryside. kind of texture to them, home to valleys, lakes, kind of like meat in a way. a lot of what we have come up with is plant—based the odd feral goat, and... because we know that turning to a vegan diet is simply ..electric mountain. the most sustainable thing hidden inside this mountain you can do as an individual. is the dinorwig pumped but besides that, storage power station,

and it is basically we need some protein. a monster battery. and there we have explored it stores energy by pumping everything from insects, water from this lake to a lake not only because they're at the top of the mountain and then letting it flow back environmentally friendly, downhill, releasing that energy but also because they are delicious. at times of peak demand. we have explored micro—algae or spirulina. the only challenge with see, when you pop the kettle spirulina is that it on during breaks in tastes like algae. championship matches of that so we really try to find ways sport they call football, of how can we actually this bad boy springs make this taste good. into action to supplement our national grid, delivering power to our homes we're going to start off in under 12 seconds. by putting this puree, a paste of pumpkin seeds, it's an incredible view! we're just going to put that in the bottom of the hot dog, it's one of the fastest and then we're going to add the carrot and our responding power stations on the planet, and we'll beetroot ketchup. have a nosey inside the thing later in the programme. so time for a tasting. mm. dinorwig offers a semi—renewable energy solution you like it? at a time when our natural mm! yeah. resources are being used up. muffled: oh, my god. it doesn't taste like a normal hot dog. no. as solar, wind, and tidal power but it tastes a lot better. alternatives advance, i would never be eating we're craving a method a normal hot dog. of using their generated oh, thank you! energy 21w, despite the flavour of all the sauces,

there's just so many different the weather or time of day. tastes in there and they're and this is where all quite intense. batteries come in. ok, it's a bit messy eating on camera, but now, this isn't your beyond the ingredients, stereotypical battery. ikea is also hoping to reduce admittedly, when i say its carbon footprint, battery, you probably think introducing hydroponic farming of the ones in these. in all stores. these are rechargeable lithium ion batteries — this method creates the perfect and we really can't environment for growing plants using their food live without these. lithium ion batteries have truly revolutionised waste as fertiliser. electronics. but we could all be getting a bit more creative they power the mobile miracles with our waste, it seems. that we use every day. ta ke leftover grou nd they have a high density, coffee, for a start. meaning they can store a lot of electricity relative because you only use 1% of the nutrients in the coffee to their small size, grounds when you make a cup so we can easily carry them of coffee, we actually use some around and we can recharge them of our coffee grounds hundreds of times. for shortbreads and others inside cells are layers for growing oyster mushrooms. of sheets stacked together — a positive cathode, negative anode, with a separator will there be caffeine in them? in between filled with will they keep you awake? a liquid electrolyte. i actually don't know, when a cell is discharged, but i don't believe so. the movement of ions from one side to the other facilitates that's it from us and our look the flow of electrons, back at some of our sustainable which then generates favourites, and a reminder that currents to power devices. tech really can change the world.

during charging, this next week, we'll give you another chance to look at some process is reversed. of our other recent adventures. in the meantime, you can catch us on social media, on youtube, facebook, instagram, and twitter. thanks for watching but the search is on for cleaner, greener and we'll see you soon. forms of energy. and for that, lara sailed to a very special island just off norway. we've travelled west now to norway. it is so calm here. it's absolutely beautiful. hello there. the last few days has but not far from here, brought some very windy the waves can reach weather across many parts of the country. up to three metres. on friday, we had winds and that's where we're heading, because we're going to go well over 60 mph here in the southwest of wales, and take a look at an island also the southwest of england. which is made up of solar panels. and we saw those very and the idea is that strong winds pushing they need to fare 0k through the english channel as well, leading to some very whatever the weather. dramatic weather watcher pictures ta ken early on in the day. now for the weekend, it won't be as windy — that's because the deep area of low pressure that 0h! thank you. brought those unseasonably strong winds is moving

i've made it. into the norwegian sea, wow! so already winds are dropping. we're walking on water. but we will continue to see some sunshine and showers during saturday. these certainly aren't there could be some heavier the first floating solar panels, but the innovation ones moving down into scotland being tested here is for a while, actually some the fabric itself — creating a cost—effective, weather—resistant material that longer spells of rain could easily be scaled. for northern ireland, there's talk of a set—up near the equator the size and those showers pushing of a football pitch. in england and wales. this has been designed driest and sunniest weather likely to be across southern to withstand wind, rain, counties of england and into east anglia. and ice, but round the edges, but for england and wales in particular, it's these barriers prevent any sea still a blustery day — waterfrom getting in. not as windy, but still those gusts of 35—40 mph taking so whilst you can see i'm the edge off the temperatures, standing in a pretty large puddle right now, which may be a bit lower that's from last night's rain. than we had on friday, what i'm actually with the top temperature 22 standing on is less celsius there. than a millimetre thick. further north and west, quite a few degrees cooler than that. and it really feels it. it's quite hard those heavy showers continue to stay balanced. into the evening before it's made from polyester fading away overnight, and the wind continuing to drop, as well. coated in a polymer. as we head into the second half of the weekend, and what makes this polymer there's a brief sign of this special is how lightweight yet ridge of high pressure from the atlantic — strong it is, meaning it's idealfor this type but all it's doing is changing of installation. the wind direction to a cooler northwesterly. in the not—that—distant future, again, the winds continuing we think we can build to drop, though, on sunday with lighter winds for much

systems that are comparable with the so—called ground mount of the country, some installations on land. sunshine and showers for scotland, the heavier ones and that will be a big for northern ireland, pushing it in northern breakthrough for floatable and eastern parts of england with the risk of some dykes, because then you have, suddenly, large surface thunderstorms, too. areas where you can build our top temperature will be 21 celsius in the southeast on sunday. cheap renewable energy, but quite a bit cooler very close to large than saturday across scotland with those northwesterly breezes. into the early part of next consumer groups. week — first of all, and making use ofjust we have a weather system coming a fraction of the sea's vast in from the atlantic. it's quite a weak affair, surface area, as well as taking advantage of the water's really, and the winds ability to keep the panels are light on monday, but we're looking at a lot cool, means that the scaling of cloud to move its way of this does seem plausible. eastwards and some patchy rain, too, maybe a little bit heavier the solar power being for a while across southern harnessed is being used parts of england and wales. here on this fish farm. now, the island has been dryer weather in the northeast developed to be the exact right of scotland, but it's only 13 celsius in aberdeen and around size to harness the right 19 celsius in cardiff. amount of power then for tuesday and wednesday, in the summertime. we have another deep that's presuming that area of low pressure the weather's good. heading our way, threatening the rest of the year, to bring some more very strong it's running on diesel. winds across the uk. so obviously, you can see the a spell of rain probably will be followed by some environmental benefits of this. sunshine and some showers. but the suggestion is that an island this size, if anchored in the london area, could power 20 average uk homes.

make the island the size of a football pitch, and that could rise to 200. but, of course, the investment needed is huge, so moving forward on this could prove more complicated than the proof of concept. back at dinorwig, i'm heading deeper underground. the water comes from the lake, which is about 600 metres above us, down this pipe, hits this valve and stops. this is the biggest tap you will ever see. and there are actually six of them, all in a row, down there. when they need the power, this yellow arm swings up, the valve opens, and we get

a maximum flow of water through to the turbines through there in about six seconds. when all six are open, that's 92,000 gallons per second — or as it says here, 1.5 million cups of tea. not sure if that's earl grey or english breakfast, mind. do we have flow? we have flow! and there it is, turbine number two spinning at about 500 rpm. and when all six of these turbines are all spinning, this place produces enough electricity to power the whole of wales for five and a half hours. now, dinorwig runs at about 75% efficiency because it pumps its water uphill at night, using cheap electricity it buys from the national grid, and charges a premium for the energy it generates during the day. if we were to move completely away from fossil fuel power stations, would that mean

that this sort of power station wouldn't be able to run? in reality, yeah, if we need to pump that water up the hill, we've got to go in and buy the electricity from the market somewhere, this is bbc news, whether that is a thermal power i'm aaron safir. our top stories: station, a set of windmills, a gas power station, russian opposition leader whatever it might be. alexei navalny leaves hospital why are there not and is expected to be flown more of these around? to germany — in a coma. i suppose the greatest challenge is finding a suitable it's claimed he was poisoned. place in the uk to build them. lightning strikes spark several you've seen yourself that you've got to have hundred more wildfires them in a specific area. it's got to have two lakes. including some of the biggest the two lakes are ideally ever seen in the state. reasonably close together, protestors in belarus form good vertical separation. a human chain across the capital, as the opposition you know, they're not the kinds leader tells the bbc of things that you can easily the campaign against sort of build on the back the president goes on. of a wagon and wheel just we have no right to step back now because... it in somewhere. you know, those lakes need ..if not not, we'll be slaves. to exist or you need to create them, so it comes with cost. so i think it's just a limited amount of options, in terms of locations and, swimming into the for such places. unknown, the volunteers yeah, cool. you ever get lonely down here? laughs: sometimes!

11,000 followers in his first two days. a decision towards a level students was reversed by the uk government following protests, and apple became the most successful us company ever, worth over $2 trillion. it was also the week that scientists at the university of delaware said they had developed a coding mechanism that could ease the interface between humans and artificial intelligence. it's a new type of polymer that could create future cyborgs by more easily collecting electronics to human tissues. a team of researchers at the university of michigan has revealed a new rechargeable zinc battery that could provide energy to robots in a similar way to a human‘s fat cells. the new design will help build capacity in robots as they become smaller and will help in

applications like drones. an autonomous boat has completed a 22 day mission mapping a part of the sea floor of the atla ntic of the sea floor of the atlantic ocean. the 12 metre long service vessel was developed by c—kit international. it was skippered from a base in eastern england and the mission was part funded by the european space agency. finally, how handy would it be to have a chameleon tongue like a robot snatcher to reach all those far—away objects? this robot has been developed by a tea m robot has been developed by a team to help collect items without getting too close. the tongue works fast and can snatch up to 30 grams in up to 600 milliseconds. i want to share with you a fact that i hadn't fully understood until i met climate scientist ed hawkins last year. now, i'd known that our weather was getting worse and our sea levels were rising, and i'd

known that global warming was happening because we were emitting carbon dioxide and methane into the air at a runaway rate, but what i hadn't fully understood is this — simply reducing greenhouse gas emissions will not bring global warming under control. in order to stop global warming, we need to do something very drastic indeed. if we end up in a world where our emissions are net zero, and we're not increasing the amount of carbon dioxide in the atmosphere any more, then that will stabilise global temperatures at the point at which we do that. but that's not realistic, is it? to reduce global temperatures, we would need to somehow remove carbon dioxide from the atmosphere. now, there are already ways of capturing c02 at source — on its way out of power stations, for example. but this doesn't get it all, by any means. what you need is something to pull c02 back out of the air.

what you need is something like this. it's called the artificial tree. the air passes through these filters, which are made of a very special material, because the c02 actually clings to this material as the air passes over it. now, once these filters are saturated with carbon dioxide, this whole thing moves down into a container of water where this particular material releases the c02 into the sealed container. and then, congratulations, you've captured yourself some c02 from the air. this is the brainchild of klaus lackner, here at the aptly—named negative emissions center at arizona state university. i realised very early on this is a waste management problem. we are dumping c02 into the atmosphere and itjust stays there. so it was very clear to me in the early ‘90s that some

time in the 21st century, we will have to stop emitting. klaus was the first scientist, back in 1999, to publish a scientific paper suggesting carbon capture from the air was a feasible way of combating climate change. the problem was no—one seemed to be listening. if you look at the climate change problem in the ‘90s, we had models which told us it's happening, but you couldn't really see it out in the real world except with a microscope. in the 20005, you could measure it. it was happening. in the teens, now you can see it happen even as a non—expert. climate has changed. in the next decade, as it grows out of the noise, it becomes loud and clear, and it starts to hurt. and once it hurts, people will say, "now what do we do about it?" klaus argues that since we're failing to meet our targets for lowering co2 emissions, carbon capture from the air is now unavoidable.

and now people are listening. his technology has recently received commercial investment. we have put so much c02 in the air that we actually have to come back. so we call ourselves the center for negative carbon emissions because we are actually thinking about having a period in this century in which we will have to take 100 parts per million back. now, that's more c02 than the world emitted in the 20th century. how many of these do you think we would need? a lot. now, these are very small, but go to the size of a shipping container. if you wanted to actually match current emissions, you would need 100 million of them. now, these are bigger than this, right? but 100 million sounds like a horribly large number until you start deconstructing it. we build 80 million cars and trucks a year. shanghai harbour is sending out about 30 million full shipping

containers every year. so i would argue as far as industrial scale goes, this is large, but not outrageously large. making that piece was absolutely fascinating and it really helped me to think about the different approaches that we can take to tackling the different aspects of climate change. so, as well as removing our emissions from the air and using greener energy techniques, we can of course also reduce the energy that we use and reduce the emissions produced by certain industries. now, one of the big ones is agriculture and meat production. and over the past few months, both kate and lara have been looking at alternatives to the food that we eat. kate: at beyond meat in la, they've designed the next generation of meat substitute by analysing it at a cellular level.

they then went hunting through the plant kingdom for enzymes, fats, and proteins that behave in the same way as the elements of the meat. in this case, extracted from peas, potatoes, and with beetroot for blood. i know it's not meat, and i'm going to taste it soon, butjust from thejuice, it feels like a burger! as well as the visual appeal, scientists here use an e—nose to examine the components of aroma so they can be mimicked in the lab. i'm just going to do it the way you do a burger — straight on in, try and... oh, it's oozing all over my fingers. and you know what, ethan, it's dripping down my hands... ..and oozing in a very burger—like way. 00:18:52,855 --> 2147483051:46:11,143 you look at the amount of water 2147483051:46:11,143 --> 00:01:25,265 we use, we use 99% less water.