this is the briefing, i'm victoria fritz. our top stories: senators swear an oath of impartial justice as the republican—controlled chamber is transformed into a court of impeachment. scotland's most populous city unveils radical plans to achieve carbon neutrality by 2030. police in panama have arrested ten people on suspicion of murdering a woman and six children as part of a strange religious ritual. the bitter border war continues as migrants are forced to survive the serbian winter. we have a special report. coming up in the business briefing: big data and the climate crisis. how our tech addiction is fuelling global warming,

and what silicon valley can do about it. a warm welcome to the programme, briefing you on all you need to know in global news, business and sport. you can be part of the conversation. the more time we spend on social media, online shopping or streaming video, the more data we generate. research from sweden suggests that data alone could use as much energy as transport by 2025. would you be prepared to use less tech to save the planet? tell us what you think. just use the hashtag bbcthebriefing.

senators have sworn to deliver impartialjustice at the opening of president trump's impeachment trial in washington. he denies obstructing congress and abusing his powers by pressuring ukraine to invesigate his political rivaljoe biden and his son. 0pening statements in the trial are due to be heard next week. here is our norh america correspondent peter bowes. a rare scene of pomp and ceremony in the senate, setting the scene for only the third impeachment trial of aus only the third impeachment trial of a us president in the country's history. the charges facing donald trump were read out in full by the chief prosecutor. house resolution 755. impeaching donald john trump, president of the united states, for high crimes and misdemeanours. john roberts, the chief justice high crimes and misdemeanours. john roberts, the chiefjustice of the us supreme court, will run the trial.

his firstjob, to swear in the jurors, members of the senate. the weight of the task ahead resting on their shoulders. for all of us, the solemnity, gravity of the moment in oui’ solemnity, gravity of the moment in our history hits you square in the back when you take that both. a separate oath, designed by the senate, only four senators who will serve on a court of impeachment. the feeling in the senate chamber was solemn, serious, profound. the trial will start in earnest on tuesday. it is still not clear whether witnesses will be called for new evidence allowed. there is plenty of it, including interviews given by an aid to the president's personal lawyer, who has told american television he was part of a campaign to get dirt out of ukraine on donald trump's political rival, a campaign orchestrated by mr trump. president trump insists the whole affair is a

hoax. i don't know lev parnas, other than i guess i had pictures taken, which i do with thousands of people, including people today that i didn't meet, but just including people today that i didn't meet, butjust met him. i don't know him at all. don't know what he is about, don't know where he comes from, know nothing about him. in another twist, ukraine has announced another twist, ukraine has announced an investigation into the possible illegal surveillance of the former american ambassador to kiev, following the release of text m essa 9 es following the release of text m essa g es by following the release of text messages by congress as part of the impeachment case. the list of potential witnesses just got a little longer. and you can stay right up to date with all of the developments in the impeachment inquiry on our website, with full analysis from our correspondents and editors and all the latest updates, including details on how the senate trial will proceed. let's brief you on some of the other stories making the news:

the chinese economy recorded its slowest annual growth for almost three decades in 2019. the growth rate dropped to 6.1% as china came under pressure from weakening demand and the trade war with the united states. three suspected neo—nazis have appeared in court in the us state of maryland after being arrested by the fbi on suspicion of planning to incite violence at a rally for gun rights in neighbouring virginia. investigators said the men had been detained as part of a continuing investigation into a white supremacist group. the model gigi hadid has been excused from serving as a juror in the rape trial of harvey weinstein. she was in court in new york on the eighth day ofjury selection, but as expected was dismissed due to her high public profile. the former hollywood producer is being tried on two charges of sexual assault, which he denies.

a spanish billionaire has been sentenced to 18 months injail and fined $58 million for trying to smuggle out a picasso painting to sell at auction. the painting, head of a young woman, has been deemed a national artistic treasure, meaning it is banned from leaving spain. police in panama have found the bodies of a seven people in a remote area controlled by a religious sect known to carry out exorcisms. police rushed to the area in western panama and found inviduals from ngabe—bugle, panama's largest indigenous group, being held there against their will. they managed to rescue some who had also been tortured. 0livia crellin reports. a remote area of rural panama,

unremarkable from the air, but from the last three months, the site of a brutal religious sect who called themselves the new light of god. police headed to the area in western panama near the caribbean coast on tuesday. they were shocked when they discovered a bizarre torture ritual taking place in a makeshift church. nearby, they uncovered a freshly dug mass grave. bodies of seven members of the remote ngabe—buglejungle community, a pregnant woman and six children, were uncovered, tortured, beaten, turned and hacked to death with machetes. translation: my sister was in her house and she was killed. i don't know what happened, but yes, we have to ask people for justice. this must end. there is already too much suffering here. those killed were preyed upon by a cult who had only recently moved to the area. they say god told them to

make those they killed repent or die. translation: the activities of this group of people who are working against the community were neutralised. they were religious, but they were working against the community, and they produced fatal victims. upon learning this information, the police acted quickly and their aggressors were quickly and their aggressors were quickly apprehended. police have arrested ten people on suspicion of murder. at least 14 others who had been tied up and beaten with wooden sticks and bibles were rescued from the building and flown to safety. we've been focusing this week on climate change and the scale of the crisis — sir david attenborough‘s words, you remember from yesterday. glasgow is working on plans to go carbon neutral in the next ten years. itjoins many other places across the uk with similar goals, but scotland's biggest city will be in the spotlight more than most. it is hosting a major un summit on climate change in november.

0ur science editor david shukman has been looking at glasgow's effort to go green. the morning rush hour in glasgow. commuters pouring to scotland's biggest city. nearly all motorways run straight through glasgow. for decades, the car has been king, but now there's a radical plan to go carbon neutral. new charging points for electric vehicles are being installed. the aim is to make the city green in ten years. and the council's greeting lorries are going to be at adapted to run on clean hydrogen as well as diesel —— gritting. but this is only one a very small —— one very small part of a very long list of what needs to be done. how big challenges it? getting to carbon neutral by 2030 is a big

challenge. it is certainly one we are taking very seriously, and it's not enough for a few people in the council to be working on that. it's a challenge that everybody has to ta ke a challenge that everybody has to take part in, that we need to get everybody across the city engaged with, and that we need to be working on now. already, more and more of the uk's electricity is becoming carbon free. here on the edge of glasgow is one of europe's largest wind farms. there are big plans for many more turbines, and for solar panels. going totally carbon neutral won't be easy. we've done some studies recently which show that we need to start installing 4000 heat pumps and electric vehicle charging points every day across the uk. every day? every day, according to meet the targets that we set ourselves for becoming carbon neutral. is that remotely feasible? if we start now. hottest of all will be making glasgow's housing greener. and that is the case across the country, because most homes are heated by gas. a mass of pipes being worked on here is part of a scheme to draw warmth from the river clyde

and use it to heat an entire district. we are not learning anything on the site, that's the beauty of it. i asked dave pearson, who is in charge of the project, if glasgow is really on course to be carbon neutral. i don't think so. i think in all honesty, momentum is all about progress. there's lots of ideas, lots of talk, but we need to actually decide that the city will become gas free by the time, and how best to do that. at the moment, we haven't even started. it is hard to believe as things stand how glasgow oi’ believe as things stand how glasgow orany believe as things stand how glasgow or any other major city could possibly be carbon neutral in as little as ten years time. but the council says it wants to send a signal that at least it is trying. in this matter is, because an international summit on climate change is due to take place here in november, and the world will be watching what this city does. let's turn to our top business story now, our addiction to technology and its impact on the environment.

computers will be using 20% of the world's energy within five years according to one estimate, as they feed our appetite for streaming, social media and online shopping. that's as much as transport uses today. now microsoft has pledged to be carbon negative by 2030, removing more carbon than it produces, and by 2050 it hopes to have wiped out its carbon footprint altogether by removing all the carbon it has ever emitted since it was founded in 1975. microsoft's president, brad smith, says the ultra—wealthy tech giants need to lead the way in the fight against climate change. i think that we will see a lot of energy in the tech sector, in part because it's a sector that is doing

well. it can afford to make these kinds of investments, and it should. i think it's something where competition can make each of us better. we can make each other better. we can make each other better. and we always want to compete and do better with the people in your industry, but at the end of the day, if we make each other better, the world is going to be better off, and we should applaud each other as we each take these new steps. with me is simoney kyriakou, who is the editor of financial adviser. what do you make of that? nice words. do you think it will sort of translate to real action? i mean, anyone can say we want to do something by 2050. it feels a long way off. sure. well, they have also

committed to a five year plan, which will be to use only renewable energy for its global network of data centres. in data centres, they get extremely hot. they use a lot of energy to cool them down. so that's one quite tangible plan that they can already put in place. they have committed — they've got a development fund of at least $1 billion that will help them develop the technologies that will enable them to meet these plans and these goals. so they have the money, they have the will, and they have the technology kill know—how and expertise. so i definitely think that they will make strides that they are met —— technological know—how. they call it a moonshot, if you aim for the moon, you might hit a tree. i think they will probably hit the moon on this one. whether they do it completely in the timescale or not is another matter. i wonder whether people around the world really realise what the impact of this sort of tsunami of data we are all creating really has. i mean, as you say, you mentioned the heat thatis as you say, you mentioned the heat that is generated from these data centres, but it is extraordinary. this idea that one fifth of all energy consumption will come from oui’ energy consumption will come from our data usage injust five energy consumption will come from our data usage in just five years, energy consumption will come from our data usage injust five years, i people aware of it, that it is not sort of an infinite amount of energy that we have, an infinite amount of

data? well, exactly, if you think 20 yea rs data? well, exactly, if you think 20 years ago we were told that going online and using technology will reduce our carbon footprint, because we will be printing less and replacing fewer trees, we will be working from home so we don't need to be driving into the city or taking pollution intensive buses or trains or whatever into the city. so we have been taught that technology can help us be carbon neutral, and now we are finding out that actually using it can be quite damaging and deleterious for the environment. but if companies can use that knowledge and expertise to improve the way they use... whether they use hydraulics or wind turbines or set up hydraulics or wind turbines or set up their own sort of cooling centres, that i think can really help reduce that, and maybe we'll see it reduce to 18%, 15%, over the next ten, 20 years. it would be amazing if we could. do come back, we have papers to run through, including the seattle times, which is running on this story. we will talk about that in half—an—hour‘s

time. stay with us on bbc news. still to come: geneva is replacing men with women, but only on its roadsigns. we'll tell you why after the break. day one of operation desert storm to force the iraqis out of kuwait has seen the most intense air attack since the second world war. tobacco is america's oldest industry and it's one of its biggest, but the industry is nervous of this report. this may tend to make people want to stop smoking cigarettes. there is not a street that is unaffected. huge parts of kobe were simply demolished as buildings crashed into one another. this woman said she had been given no help and no advice by the authorities. she stood outside the ruins of her business. tens of thousands of black children in south africa have taken advantage of laws passed by the country's new multiracial government and enrolled at formerly white schools.

tonight sees the 9,610th performance of her long—running play, the mousetrap. when they heard of her death today, the management considered whether to cancel tonight's performance, but agatha christie would have been the last person to want such a thing. you're watching the briefing. 0ur headlines: the 100 lawmakers of the us senate have been sworn in as jurors for the impending impeachment trial of president trump. police in panama have arrested 10 people on suspicion of murdering a woman and six children as part of a strange religious ritual. shamima growing numbers of asylum seekers are trying to enter hungary illegally from serbia and romania. hungarian police say more than a hundred attempts are made to cross their border fence each night. nick thorpe reports

from northern serbia. winter in northern serbia in the city here and in derelict railway buildings, dozens of migrants are trying to keep warm. some try to cross the fence night after night. 0thers cross the fence night after night. others are just trying to survive the freezing weather. ethnic hungarian has been helping the homeless, migrants and refugees for many years. in his garden, he builds stoves from old barrels to install in the places where they seek shelter. we are just covering the bottom of the barrel is so it will be insulated, because the heat would eat up all the metal but if you have coverage like this, it will last longer. his stoves are simple but effective. this one keeps 16 afghans worn into

rooms. he's just installed the new one in an upstairs room where the syrian kurds live. they are also staying in the surrounding areas and they try to get through the river tisa again. they don't always succeed. i would say it is a very desperate move of people trying in every place, but basically they are staying in serbia. some of the people here have come from bosnia after trying for months to across—the—board are there and get to croatia. 0thers to across—the—board are there and get to croatia. others have come up to serbia from macedonia, even greece. there's a growing number of people reaching northern serbia, but where can they go from here? one of the men recognised me. three years ago, i interviewed him in bulgaria.

he reached france but after more than two years there was deported. now he's trying again. don't go to hungary because it is pants, it is a wall, you can't cross the border. what are you doing here every day? every day we are waiting to the end of winter and the coming summer time. so we can walk ten or 15 days in thejungle time. so we can walk ten or 15 days in the jungle to go back to italy, france, germany. if we stay here to help stay warm. we have blankets, this is like our house, we can't stay in the wintertime. some migrants across—the—boa rd stay in the wintertime. some migrants across—the—board on cargo trains. hungarian police are on high alert and return all those they can stop me this is a bitter war no border zone in winterfor both the migrants trying to cross and the police trying to keep them

out. —— bitter border zone stop in thought, bbc news. now it's time to get all the latest from the bbc sports centre. hello, i'm gavin ramjaun. american teenager coco gauff will face venus williams in the first round of the australian open. the 15—year—old announced her arrival on the biggest stage by beating williams at wimbledon in july last year. if she can do the same again in melbourne, then gauff could potentially face serena williams in the quarter—finals. defending champion naomi 0saka is also in the same quarter, she'll play her first round match against marie bouzkova of the czech republic. in the men's half, defending champion novak djokovic has a difficult opening match. he'll be up against germany's world number 37 jan—lennard struff. roger federer has been drawn in the same half as djokovic, meaning the pair could meet in the semi—finals. he'll play the american, stevejohnson. england have a slight edge over south africa, they finished on 224—4 after the opening day of the third test in port elizabeth.

the tourists started well on a slow pitch, with an opening stand of 70 between dom sibley and zak crawley. england were in danger of being overwhelmed when they lost three wickets for 35 runs. ben stokes, fresh from being named international cricketer of the year, and ollie pope, stopped the rot. they're both still there after adding 76 for the fifth wicket. they played very well in the morning session, played really well. sibley and crawley played excellently, they judged at length really well and south africa bowled really well at them and mid—afternoon south africa got their rewards for their patience and high level of skill with four wickets. at the end pope and stokes dragged the issue towards england. england will be the happier of the two tea ms england will be the happier of the two teams and stokes and pope played exceptionally well in their partnership at the end of.

world number one brooks koepka is tied for third heading into the second round of the abu dhabi championship. it's his first competitive round of golf for three months following injury. the american, a four—time major winner, shot a bogey—free round of 66 to finish two shots off the pace. we're just a few hours away from the final stage of the dakar rally with carlos sainz leading the way. the spaniard ended the penultimate day in saudi arabia, with a 10—minute lead over defending champion nasser al attiyah. two—time formula one world champion, fernando alonso, is 13th overall. 0n the bikes, ricky brabec is the man to catch. the honda rider is nearly 14 minutes clear of pablo quintanilla. as roma legend francesco totti showed that he is still a wizard with the ball at his feet after the 43—year—old scored a stunning free—kick in an eight—a—side league match. named after himself, the totti sporting club play

in a local league and the former roma captain proved he still has what it takes after scoring a thunderbolt in one of their recent matches. totti smashed a sublime free—kick with the outside of his foot into the top corner of the goal from a tight angle out on the right—wing. still very much got it. you can get all the latest sports news at our website, that's bbc.com/sport. but from me, gavin ramjaun, and the rest of the sport team, that's your friday sport briefing. 0n the streets of the swiss city of geneva, a project to increase the representation of women has seen hundreds of road signs be replaced. gareth barlow has the details. roadsigns: around the world they so often feature the image of a man, but in the swiss city of geneva, are being replaced by women. 250 of the city's 500 pedestrian crossing signs now feature images such as a female

couple, a pregnant woman or an elderly lady to increase the visual representation of women. translation: everything that represents more women in public spaces helps women's causes. we walk over the same crossing so why not the same signs? the $58,000 scheme which hasn't been popular with eve ryo ne which hasn't been popular with everyone as part of the city's action plan against sexism and harassment in public spaces. a rogic named after geneva's street with women is also under way and the hope is other regions will soon follow suit. gareth barlow, bbc news. tell me what you think about our talking point today. would you use less tech to save the planet? we know data is consuming a huge amount of energy but some relu cta nce huge amount of energy but some reluctance on twitter today. nadim says u nfortu nately reluctance on twitter today. nadim says unfortunately the internet has become necessary as part of our daily lives so we can't imagine life without it. sally on twitter says tech will save our species and bob

says why don't we collect less data instead ? says why don't we collect less data instead? get in touch with me on twitter. hello there. after all the rough weather, wet and windy weather this week, you will probably be pleased to hear things are calming down but not just yet. the to hear things are calming down but notjust yet. the earlier satellite picture shows this stripe of cloud that has brought outbreaks, showers behind, and where you see the hook, brisk winds are still affecting the far north and north—west of scotland, starting friday morning with temperatures generally between 4- with temperatures generally between 4— nine. as we go through the day, quite a few showers and hefty ones across parts of and wales and these will contain hail and thunder at times and this band of showers pushing down across scotland and northern ireland with snow mixing in over the hills above 300 metres in

scotla nd over the hills above 300 metres in scotland adds more showers into the far north—west later in the day. some sunny spells in between and the air starting colderfrom air starting colder from the north—west and staying windy in the north—west and staying windy in the north of scotland. windy through friday night into early saturday and we will see further showers, wintry to relatively low levels at the moment. further south, to relatively low levels at the moment. furthersouth, dry, clear spells and a colder night with temperatures widely close to freezing, dropping below in a few places. that leads us into our spell of calmer weather. drier and brighterfor the weekend of calmer weather. drier and brighter for the weekend with overnight frosts, but look at the pressure chart. the areas of low pressure chart. the areas of low pressure that have been dominant get muscled out of the way by this big, strong area of high pressure which is really going to settle things down through the weekend. means a lot of dry weather with sunshine after the cold start on saturday. still some showers blowing in across scotla nd still some showers blowing in across scotland where it stays fairly windy through the day. top temperatures on saturday, down on where they have

been, 6—9, but bear in mind, more sunshine and not as windy for most so feeling more pleasant. into sunday, told again with a frost on sunday, told again with a frost on sunday morning. again those temperatures at freezing or below and some spots in the countryside at -3 and some spots in the countryside at —3 or —4. after the cold start, looking like a fine day with long spells of sunshine. perhaps more cloud into the north—west of scotla nd cloud into the north—west of scotland and may some rain for the northern ireland. still breezy here with 6— nine. another chilly night for many, especially in the south on sunday night, and the greater chance of fog to take us into monday morning.

this is the business briefing, i'm victoria fritz. big data and the climate crisis. how our tech addiction is fuelling global warming, and what silicon valley can do about it. plus: bruised by the trade war, china sees the weakest growth in three decades. but will a truce with us kick—start the recovery? and, on the markets, more record closes on wall street. asian shares rise as that chinese growth number comes in as expected,