wyre davies, bbc news, in the amazon.s in the midst of its worst winter smog in recent years. more than half of all of its cities are experiencing high levels of air pollution. visibility in beijing was reduced to less than 200 metres this week, increasing use of coal and current weather conditions have left a cloud of pollution over 3000 kilometres long across northern and central regions. john sudworth has travelled to the worst polluted city in china and sent us this report. voiceover: somewhere, underneath this murky gloom is a city of 10 million people. and, for the unfortunate residents of this city, this is normal. for the past 30 days, the average air quality in this city has measured as hazardous on the official scale. you can smell, even taste the coal dust in the air, the grim, tangible reality of this country's model of economic growth. and people have no choice but to live, eat and sleep in this toxic smog, 2a hours a day. it's like living under a cloud, this noodle seller tells me. the smog i5 harming my chi

wyre davies, bbc news, in the amazon.pping deaths from drug overdoses, are fix rooms or consumption rooms the answer? they are places where users can legally inject hard drugs like cocaine and heroin under medical supervision without fear of prosecution. there have been repeated calls for them to be introduced here in the uk. we went to denmark to spend a day inside a fix room and we need to warn you, this report shows illegal drug—taking, including scenes with addicts injecting which some viewers may find uncomfortable to watch. this is copenhagen‘s seedy red light district, a well—known area to buy drugs. it's home to one of the city's so—called fix rooms, a place where users can legally take class—a drugs safely under supervision and without the fear of prosecution. there's calls to introduce them back in the uk, so i'm spending the day here to see how they work. it's 8am and inside, users have already turned up. my name is elliott and i am 25, almost 26 years old. tell me what you are about to inject? it is good cocai

also mean deforestation, and the end of traditional life for many of brazil's indigenous tribe, as wyre daviesports. from the heart of the planet's greatest rainforest emerges one of the world's biggest civil engineering projects. a monolithic monument to progress. the belo monte dam is brazil's answer to its growing energy needs. mired in controversy and allegations of corruption, the $18 billion dam partially blocks the xingu, a major amazon tributary, and has flooded thousands of acres of rainforest. there's a human cost too. the local fishing industry has been decimated, and thousands of riverside dwellers have lost their land and their livelihoods. forced into a completely alien, urban environment. we get angry, sastuma, showing us his now worthless fishing licence. we see these corporations making millions from what used to be ours, he says, and we can't even use the river any more. building the dam brought hundreds ofjobs to the riverside town of altamira. but it also led to increasing deforestation and the permanent loss of many low—lying islands. supporters of hydropower admits mistak

this report from our south america correspondent wyre davies contains some flashing images.creaming outside the jail as the riot broke outside the jail as the riot broke out during visiting hours on new yea r‘s out during visiting hours on new year's day. the violence at the largest jail year's day. the violence at the largestjail in year's day. the violence at the largest jail in manaus year's day. the violence at the largestjail in manaus involved rival gangs attacking each other with weapons smuggled into the prison. there were reports of rival gang members being tortured and even being decapitated. many of brazil's jails are in effect run by criminal gangs with the prison authorities y unwilling or unable to counter act the power of the criminal bosses. as night fell, reports emerged that the violence being committed inside. translation: my son is an inmate and the police won't care about him. i wa nt to the police won't care about him. i want to know how my son's is. this isa want to know how my son's is. this is a bullet. a local security official said the death toll c

a warning — this report from our south america correspondent, wyre davies, contains some flashing imagescrying, screaming, outside the jail, as the riot broke out apparently during visiting hours on new year's day. the violence at the largestjail, in the northern city of manaus, involved rival gangs attacking each other with guns and other weapons smuggled into the prison. there were horrific reports of many rival gang members being tortured, and even being decapitated, after being taken hostage. as night fell, and armed police tried to regain control of the jail, reports emerged of the violence being committed inside. translation: my son is an inmate there. the police won't care about him. i want to know how my son is. my son's in there. this is a bullet. a local security official said the death toll could be as high as 60. translation: there were deaths, unfortunately. we have some outside the prison, who were thrown from the prison by the inmates themselves. there have been escapes, we don't know yet how many. we're already looking for the escapees in the forest and highways. this is

a warning — this report from our south america correspondent wyre davies contains some flashing imagesmbers crying, screaming, outside the jail, as the riot broke out apparently during visiting hours on new year's day. the violence at the largestjail, in the northern city of manaus, involved rival gangs attacking each other with guns and other weapons smuggled into the prison. there were horrific reports of many rival gang members being tortured, and even being decapitated, after being taken hostage. as night fell and armed police tried to regain control of the jail, reports emerged of the violence being committed inside. translation: my son is an inmate there. the police won't care about him. i want to know how my son is. my son's in there. this is a bullet. a local security official said the death toll could be as high as 60. translation: there were deaths, unfortunately. we have some outside the prison, who were thrown from the prison by the inmates themselves. there have been escapes. we don't know yet how many. we're already looking for the escapees in the forest and highways. thi

wyre davies has visited the first of the mega—dams, called belo monte, and reports on the potential impactt of the planet's greatest rainforest emerges one of the world's biggest civil engineering projects. a monolithic monument to project —— progress. the belo monte is serving brazil its growing needs. the $18 billion dam partially blocks third xingu and has flooded thousands of acres of ra i nfo rest. flooded thousands of acres of rainforest. there is a human cost as well. local fishing rainforest. there is a human cost as well. localfishing industry has been decimated. dozens of riverside dwellers have lost their land and livelihoods. forced into a com pletely livelihoods. forced into a completely alien urban environment. translation: we get angry says this man who is showing us his now worthless fishing licence. it used to be ours, he says, we can't even use the river any more. building the dam brought hundreds ofjobs to the riverside town that it also led to increasing deforestation and the permanent loss of many low—lying islands. supporters of hydropower admit mistakes were made. it

our correspondent wyre davies says this is the latest deadly riot in brazil's violent prison system. as the riot broke out during visiting hours on new year's day. the violence at the largestjail in the northern city of manaus involved rival gangs attacking each other with guns and other weapons smuggled into the prison. there were horrific reports of many rival gang members being tortured and even being decapitated after being taken hostage. many of brazil's overcrowded and underresourced jails are in effect run by powerful criminal and drugs gangs, with the prison authorities unwilling or unable to counteract the power and influence of gangland bosses, who run their empires from within the walls. as night fell and armed police tried to regain control of the jail, reports emerged of the violence being committed inside. translation: my son is an inmate there. the police won't care about him. i want to know how my son is. my son's in there. this is a bullet. a local security official said the death toll could be as high as 60. translation: there were deaths, unfortunately. we have som

mean deforestation, and the end of traditional life for many of brazil's indigenous tribes, as wyre daviest civil engineering projects. a monolithic monument to progress. the belo monte dam is brazil's answer to its growing energy needs. mired in controversy and allegations of corruption, the $18 billion dam partially blocks the xingu, a major amazon tributary, and has flooded thousands of acres of rainforest. there's a human cost too. the local fishing industry has been decimated, and thousands of riverside dwellers have lost their land and their livelihoods. forced into a completely alien, urban environment. we get angry, sastuma, showing us his now worthless fishing licence. we see these corporations making millions from what used to be ours, he says, and we can't even use the river any more. building the dam brought hundreds ofjobs to the riverside town of altamira. but it also led to increasing deforestation and the permanent loss of many low—lying islands. brazil says it wants to build at least 50 hydroelectric dams across the amazon. the government says it is clean, sustainable ener