The largest Nursing Union is to hold a series of protests this summer and a possible ballot for Strike Action later this year. Labour says its proposed robin hood tax on Financial Transactions would raise billions of pounds for public services. Now on bbc news, its time for click. This week regenerating teeth, unusual vegetation, and, goodness gracious, Great Balls Of Fire energy, as our demand for it grows, the world is faced with a challenge. When we burn coal, the energy that has been stored inside formally and is of years is released, to power cities and machines. But so, of course, is all the bad stuff that is polluting and changing the environment. Countries have met and agreed to reduce Carbon Emissions and invest in clean energy solutions, we are harnessing more solar and wind energy than ever, and last month the uk had its first day of Electricity Supply without burning any coal. But, green power is still a long way from taking over from fossil fuels. But what if there was a Clean Energy Source that could release 10 million times more energy than fossil fuels, with an almost limitless supply which could keep the planet running for millions of years . Well, turns out, there is, and the answer lies in the stars. In the heart of the sun, under intense pressure and heat, Hydrogen Atoms change from gas into superhot plasma, and in this burning soup, they fuse together forming helium, and releasing immense amounts of energy. This is nuclearfusion, and this is what scientists have been trying for more than 60 years to recreate down here on earth. We have to do something similar to a star, which has gravity, and to do that, we use Magnetic Fields, and were talking about Magnetic Fields that create more pressure than the Water Pressure at the bottom of the deepest ocean. So youve got this huge pressure trying to compress the plasma, and youve got to hold it in place for a very long time as well, to get more energy out than you put in. If you can keep the superhot plasma in place for long enough, the energy released can keep everything hot, without the need for external power. The fusion then becomes self sustaining, thats when the magic happens. Thats also the hard bit. We are making progress, though, we have already achieved fusion, and some of the best fusion happens inside machines called tokamaks. What is a tokamak . This is a tokamak. Now this one is just outside oxford, which turns out to be a bit of an epicentre for fusion technology. The Worlds Largest tokamak is just 15 minutes up that way. There is a problem with these machines, and that is that you end up having to put much more energy into these things than you ever get out through fusion. Which is obviously not ideal. But the company here is taking a different route. This is the lab of Tokamak Energy which is developing relatively small tokamaks, small prototypes can be tested and improved much quicker and more cheaply as the science is understood and the design is refined. This approach means the team may be the first to work out how to produce a net gain of energy. Go on then, fire it up. My word that is a Fusion Reaction inside here, we are generating plasma, which is gas with electricity flowing through it, we are going to fuse atoms together, join them together, and generate fusion energy. And this light show isnt even fusion, this isjust a warm up for the next stage which it is hoped will happen in the next year. And then what were going to do is heat it up to over 10 million degrees, up towards 100 million degrees. What will that look like . We wont be able to keep our face this close because it would get damaged. We will have to be further away outside some sort of concrete barrier. But it will actually start to go transparent, as the plasma gets really hot, ten times the temperature of the sun, 100 times the temperature of the sun. Once they have achieved the temperatures, they need to keep the plasma in place long enough for it to become self sustaining, and this is what the team hopes will create Magnetic Fields Strong Enough to do that. Instead of thick copper cables, a strip of super thin superconductor made of yttrium barium copper oxide. All this sounds hopeful, but the joke is that Nuclear Fusion has always been 30 years away. If successful, it will mean the end of our reliance on fossil fuels but there are still a lot of science to do between now and then. It could be a fantastic source of energy, likely to be the most important source of energy in the 22nd century. The point is, we need it now, and so we want to make faster progress towards this energy. While these guys try and recreate the conditions in the centre of a star, lets talk for a few minutes about capturing energy from our sun, solar energy. See, it turns out that india is in the grip of a solar gold rush. Money is pouring into the country to build Solar Power Plants to try to cater for the skyrocketing demands from about1 billion potential consumers. We sent david reid to the Southern State of tamil nadu to visit the king of the solar crop, the record breaking kamuthi power plant. Follow the morning sun for two hours in tamil nadu and it will take you to a world first. The planets largest solar power plant. Its huge. Ten Square Kilometres of Glimmering Glass and electronics, stretching as far as a drone can see. The Power Company adani threw 700 million into building the plant. And they didnt hang about, up and running injust nine months. But is big beautiful when it comes to solar power, or are the indians just showing off . Well, there might be an answer in all those clouds. If you look over there, you can see there is a gathering storm, this is one of the problems with solar power, if the rain comes, if there is too much cloud, your output is drastically reduced. But the sheer size of kamuthi means that this is less of an issue. The plant is covered in 2500 acres of land, one portion of the plant is covered with cloud, that portion, 5 , 10 . The cloud moves, away from the plant, again, it comes back. Normally, in a year, we can predict the generation for maximum, ten months. Only two months will there be variations from predictions. Each of these panels generate 310 watts of energy. 30 watts is enough for a domestic light bulb, 220 for a laptop computer, a plasma tv screen, 333, 350 watts. There are two and a half million of these panels at kamuthi. Kamuthis estimated to make enough power for three quarters of a million people. They are squeezing every last drop of energy out of whatever sun is available. Bi facial panels even generate power from light that bounces back from the ground. Or, even better, snow not that theres much snow in southern india, nor reliable all year round rain. Where water is scarce, washing dust covered panels can be impossible. An Israeli Company has developed a robot which dry cleans the panels so they get a regular dusting. As the light fades, so does the power generated. Until theyve got the batteries to store Something Like the 648 Megawatts Kamuthi produces, Solar In India will not replace dirty coal, the Noxious Gases from which pollute the country and the rest of the world. Its certainly getting cheaper. This week, wholesale prices of solar dropped below coal for the first time. India is aiming to get its solar capacity up from 12 to 100 gigawatts in five years. Bids are in to construct a bigger plant than this further north in madhya pradesh, but until then, kamuthi, the planets largest solar plant, will make the most of its place in the sun. Hello, and welcome to the week in tech. It was the week that microsoft released an urgent Software Update after discovering a flaw in the windows operating system. The bug could give hackers access by simply sending an e mail which didnt even need to be opened. A 16 year olds tweet about Chicken Nuggets became the most retweeted ever. And 02 customers in the uk were told there would be no more Roaming Charges in 47 European Countries as of next month. Take a look at these solar panels. Teslas solar roof tiles are now available. Look pricey . Well, due to their Power Harnessing qualities, theyre actually being pitched as more affordable than conventional roof tiles. From solar to sonic, a us plane returned to earth this week after two years in space. But its Mission Remains top secret. Having landed at the Kennedy Space center, all that the pentagon declared about the air forces robotic mini Space Shuttle is that it was performing risk reduction, experimentation and concept of operations development. Intriguing. and finally, Hollywood Quality Animation comes to the masses. 0k, well, not quite. A fraction of the pro kit, at 2500, it could prove Game Changing for independent movie makers and game designers. Cheering. It is one of the biggest Fund Raising Events of the year. Nearly 40,000 people ran this years London Marathon and wealth funds are still being counted, organisers are hopeful they will smash last years record of £59 million raised. 0nline Fundraising Platforms now play a big role in attracting more donations, pushing the charities causes across to users while also enabling them to give money with just one click. Justgiving, one of the biggest players, raised just under £350 million last year. This is a figure that charities may not have been able to raise without these sites but these donations are also big business. Justgiving takes up to 5 commission, others, like globalgiving, take up to 15 . They say the fees cover operational costs and innovations to ultimately raise more for charities. But for charities, this commission is money that is not going towards their causes. The majority of our funding comes from individualfundraisers, one of our runners is currently on £1500, the commission on that is going to be about £100. And on the ground, that translates into care for ten kids that could have received top to toe checkup, hiv testing, atv testing. And be insured their health and well being. It makes a huge difference. Starfish is a Small Charity which helps Vulnerable Children in south africa, who are affected by hiv and poverty, and a lot of its money goes into running a mobile health clinic. In the uk, the Charity Big Kid helps vulnerable young people in south london to gain leadership skills. Both organisations have been experimenting with kind link, a site which promises to give charities all their collected donations and will not make its money from commissions. I went to meet its founder, iskren kulev, who traded in corporate life and set up a home office, just south of the thames. Kindlink didnt start as a company, kindlink started as an idea to be a social Enterprise Charity which helps charities. It is all about transparency, he wanted to create a platform where charities would post updates. The biggest problem of the charities is how they communicate with their donors. And do the donors trust were the money is going . About 70 of donors say they would make more if there was transparency with donation. They have also added a feature to show people how much money the charity has received and how much it has spent. How has your background in financial tech helped you to put this together and also to work the system a bit, because it is all about making money, it is about making money now not for businesses but for this. I will go firstly through volume is important, how you present volumes to your providers. When i know where they can make a compromise, i can try to come up with a deal which would work for both of us. See, this is a guy you want on your side, because he knows how it all works behind the scenes. And so far it is proving successful, with more than 170 charities signed up. How would you improve on what you are doing on the pitch . For big kid, its able to spend more money on its programs, like this one, which trains young people to be football coaches. It has helped me, definitely, especially with school and stuff like that. In school, i wasnt a good kid, you understand. How does kind link cover its costs . Well, instead of taking commission from donors, it plans to take the money from businesses, they have developed this platform for companies to build a profile for themselves showcasing the good causes they support while building the brand name. The companies will be charged a monthly fee. I think it is quite fitting that they have set themselves up just across the river from canary wharf, where the financial industry makes its billions. I think it takes a certain kind of person to give all that up and come over here and work for charities. That, and a small canoe whats being created here in this lab at the University Of Nottingham could mean that you will be making fewer trips to the dentist in future. They are working on fillings that heal your teeth whilst they cant actually make a tooth regrow, they aim to encourage the Dental Pulp Stem Cells within the tooth to transition into a new healthy cell type. Goggles on, and time to talk to one of the lead researchers on the project, adam, can you tell me a bit about what you are doing here. We have developed a dental Material Technology that has been used to restore components of a patients tooth. This is the material we have here, in its solution form, and once uv light is irradiated on this solution, it stiffens into a rigid plastic or a polymer. The substance created is used in the same way as a conventional filling but the aim is it will interact with the dental pulp beneath to heal it as well as prevent further rotting. Perfecting the product involves precision and patience, the materials go through many stages of testing. 0nce solidified under a uv light, it is off for its next challenge. Is the idea that it will heal all the way up to the point of the filling, so you have a totally healthy tooth . The Healing Process will only occur if the material is in contact with the cells we screen for, we have to place this material in contact with the pulp tissue, and the pulp tissue contains the cell population, the stem cells, that we are trying to engineer for the regeneration. What is this mean for your average person who goes to have a filling . Potentially, if a person has severe dental decay and they need a filling, or if it is severe enough they need a root canal, potentially, this technology can be used as an intermediate approach, where we can intervene and reduce instances of people needing root canals. The substance is designed to be used in a similar way to current fillings and is hoped to be available within ten years after various trials and approvals are achieved. And theyre not the only ones experimenting with regenerative dentistry. Kings college have been working with an alzheimers drug, aiming to regenerate stem cells, something which could be ready even sooner, in five years. But whilst the wait for what we saw in nottingham may seem long, i am told the materials are cheap, which indicates that if this becomes a reality, it will do so for more than just the elite few. Now, over the last few years, weve reported from silicon valley, as marijuana has gradually been decriminalised in several places across the us. The Tech Companies in the area have been quick to try to capitalise on changes in the law, but there has also been some unintended consequences. For example, it turns out there is no reliable way to test whether a driver has been smoking pot. Well, as we report, nanotechnology that has previously been used to help detect cancer may now be used by Police Officers to help keep the roads safe. American Police Officers are facing a problem with pot as more states legalise it how to crack down on driving while drugged. We asked the Mountain View Police Department to explain the standard procedure to test for marijuana use. There isnt one, it all depends on whether or not we can smell something. Federal law still states that smell alone can allow an officer to investigate further. There is no quick roadside test, pot behaves differently in the body than alcohol. The difference between you and i breaking out alcohol is minimal, whereas in marijuana cases, it rapidly leaves the body. At the end of an hour, up to 90 of the marijuana in your system will have been broken down. The Police Department hopes Stanford University can help, scientists there are working on a device which will detect levels of thc, the psychoactive ingredient in marijuana. We have an array of 80 sensors. You can think of each of those sensors as a magnet. When a Chemical Reaction occurs, that indicates thc is present, a magnetic Nano Particle will cause that magnet to flip its polarisation. It is a lot like a computer hard drive, where you have zeros and ones that a read head can read. For us, rather than having a Computer Flip It from zero to one, we have a bioChemical Reaction flip it from zero to one. The potalizer tests saliva collected with a swab. It can send results to a mobile device. This is the first attempt at turning the technology into a hand held device. In a years time, the scientists want it to be easy enough to use for Police Officers in the field. I stop you, you blow into the machine, within 15 to 20 minutes of the stock, it sells me your Nanogram Level right then, 45 minutes later, get your blood drawn, and it is lower. At least i have the original, at the time when my car stopped, you were at this level. And that will help in the prosecution later on. Ultimately, researchers want the potalizer to work faster, cost less, and it should work on people. Yeah, that last requirement is key because stanford receives Us Government funding, it must comply with federal drug laws, so potalizer is yet to be tested with humans. The researchers hope it can edge out competing devices, like the thc detecting breathalyser from hound labs. Marijuana use may rise as looser laws take effect. But the right tool could help police keep the streets safe. Just before we go, a little tease about next weeks clip, which is going to be rather epic cant wait that is next week. In the meantime, follow us on twitter, and like us on facebook, too, you can see loads of extra content on the Facebook Page every day of the week. Thanks for watching, and we will see you soon. Hello, some welcome rain is on the way forfarmers over hello, some welcome rain is on the way for farmers over the weekend and initially its coming from this low pressure initially its coming from this low pressure heading from a long way south towards the uk and it will draw up warm air with more moisture, hence the chance of heavy rain. The cloud from the south west coming up already. The cloud brought rain earlier which has cleared and weve seen showers and sunshine. Showers fading away this evening and it will be clear for fading away this evening and it will be clearfor a good part of fading away this evening and it will be clear for a good part of the night. To the west, Thickening Cloud with low pressure approaching and some wind and rain. I had of that, temperatures, eight or nine. Monday morning, rain coming in across much of scotla nd morning, rain coming in across much of scotland for the rush wet across the south west, drive to the north east of scotland. Still mostly dry in the East Pennines but heavy rain in cumbria and lancashire, a wet start in northern ireland. Some rain in wales, the west of wales and rain across southern england, beginning to arrive in london. Much of Eastern England starting dry, perhaps some hazy sunshine. Cloud thickening and we will see some rain in eastern areas. The wettest weather is going to be over the hills in the west and south west of scotland, west and wales. The rain easing off this afternoon, we may get some brightness. Even with the cloud it is going to be a warm day, 16, 17. The first rain from that Weather Front and then we get more heavy rain returning overnight and then the Weather Front is stuck across the Weather Front is stuck across the uk. Where, difficult to say but it looks like it will be across yorkshire, wales and the south west of england. North of the blustery wind, sharp showers. East anglia and the south east, dry, and we have some warm air, temperatures may be 22. Not especially cold elsewhere, 17 or 18. 22. Not especially cold elsewhere, 17 or18. 0n 22. Not especially cold elsewhere, 17 or 18. On wednesday, Rain In The East Anglia and the south east of england, this will be the wettest day of the week for this part of the uk. Sunshine following on. Temperatures beginning to drop away. The last of the warm and humid air gets pushed into Northern Europe and cool air is gets pushed into Northern Europe and coolair is coming gets pushed into Northern Europe and cool air is coming our way. Sunshine and showers. This is bbc news, im shaun ley. The headlines at 4pm. This weekends cyber attack the largest of its kind says the head of the eus Law Enforcement agency, europol, and the start of the working week could expose more victims. The slowdown of the Infection Rate over friday night, after a temporary fix around it, has now been overcome bya fix around it, has now been overcome by a second variation the criminals have released. The numbers are going up. The new french president is sworn in at the elysee palace. Emmanuel macron promises to restore the confidence of the french people and said the country was on the brink of a great renaissance. Nurses vote overwhelmingly in favour of a Summer Of Protest over pay. Labour says its proposed robin hood tax on Financial Transactions would raise billions of pounds for public services. Jumping into the History Books a 101 year old d day veteran becomes the worlds oldest skydiver