this one could be fixed by simply turning down the lights. victoria gill, bbc news. and you saw him in victorious report. i m joined now by physicist dr christopher kyba from the german research centre for geosciences. you are very welcome. what is behind this? is it the type of lighting of the sheer scale of it? we this? is it the type of lighting of the sheer scale of it? this? is it the type of lighting of the sheer scale of it? we are not actually able the sheer scale of it? we are not actually able to the sheer scale of it? we are not actually able to answer the sheer scale of it? we are not actually able to answer that i the sheer scale of it? we are not actually able to answer that with | the sheer scale of it? we are not. actually able to answer that with a dated that we have. there are two facilities, one is that the types of lighting are changing and we are seeing more light shining sideways, for example advertising and facade lighting, the other possibility is that the
it was a clear night for most of us which used to mean a spectacular view of the night skies. in recent years however the number of stars we can see with the naked eye has reduced dramatically because of light pollution, or skyglow . new research suggests that in areas where 250 stars were visible two decades ago we d now see only 150. 0ur science correspondent victoria gill has more. the glow of earth at night, captured from the international space station. and that urban gleam might look beautiful, but these are actually pictures of pollution. light being sent up into space rather than directed at the ground where it s useful. and whether it s street light advertising or purely decorative, that light pollution is getting worse. to find that out, researchers collected night sky observations from amateur astronomers all around the world. people who went out to count the stars and submitted their results to an online project called globe at night. this showed that over the la
been getting about 10% brighter every year. this view of the stars is disappearing, right? so this is something that until relatively recently, within one or two lifetimes, was something that was a shared experience across everyone around the world, this going out and seeing stars at night time. it s also a symbol and a reminder that the way we are lighting is relatively wasteful, and that we don t seem to be getting better at it. the brighter the night sky is, the brighter a star has to be for us to be able to see it with the naked eye. so even in quite a rural area like this, and on a clear night, when the streetlights start to glow, the sky glows and that obscures the faintest stars. and as that glow gets brighter every year, we lose more and more of those stars from our view. light pollution doesn tjust obscure the night sky. it s been shown to affect the behaviour of nocturnal animals and to disrupt our sleep and affect our health. and unlike so many complicated environmental prob
before they head home. thank you for attention. whether a before they head home. thank you for attention. whether a deal before they head home. thank you for attention. whether a deal here - before they head home. thank you for attention. whether a deal here makesj attention. whether a deal here makes that im act attention. whether a deal here makes that impact or attention. whether a deal here makes that impact or not, attention. whether a deal here makes that impact or not, it attention. whether a deal here makes that impact or not, it is attention. whether a deal here makes that impact or not, it is future - that impact or not, it is future generations that have to live with the consequences. victoria gill, bbc news. almost half of ukraine s energy system has been crippled by a recent wave of russian missile and drone strikes and 10 million ukrainians are without power. officials in kyiv have warned the capital city faces a complete shutdown of its power grid as tempera
of corporate manslaughter. a promise from the developed world to foot more of the climate bill has raised some hopes of breakthrough at cop 27. the climate summit in egypt has been extended for another day, as negotiations continue over the issue of how to compensate less wealthy nations for losses caused by global warming. a deal that all 200 countries will sign off on has yet to be reached. 0ur science correspondent victoria gill has more. as the event closes down around the negotiators, there is still deep divisions here. because what richer countries want to achieve and what the poorest countries need are at odds. developed nations want to focus on reducing emissions of greenhouse gases, while the poorest and most vulnerable need funds for the damage already been caused by