removed from us at the rocks that brings you up to date to the south state with his full planet i, which is coming up next, looking at how some mega cities have found ways to produce a pollution that's gonna have to be held in berlin. i'll have more news for you, and 45 minutes tops, type of the in many countries. education is still a privilege. property is one of the main causes some young children walk in mind draft. instead of going to class others can attend classes. the, the minions of children will go to school. we

ask why? because education makes the world make up your own mind. made for mines from delhi to east angle to los angeles. evolution is a big issue, especially in the world's biggest cities, between decrease or long function, it will increase. that's not that it's an increase of space. in addition, contributes to 7. meaning there's a, you see all these pink dumps. they show that it almost every major city in the world. the air is father, he has some of the world health organization consider safe. when we don't into the data though, we found some surprisingly good news. and many megacities see here it's getting better. so we wanted, what are these cities doing, right, that and can replace do this.

the for this analysis, we looked at one measure of evolution, that's everywhere. p m 2 point 5, pm, 2.5. be able to find 5 pm, 2.5 kids to concise pm stands for particulars met to make show sorted particles and liquid drops instead of 2.5 microns for less much smaller than a human here. this is only one possible type of information that people like. so if he could meet from the w h o, use it as an indicator for evolution in general, just as employees. and that can come from very different sources. and because it needs to be, gets us into work. so there is really no place that the will, that is the 3 of those are to get his mentor and it's big cities, so not often particularly polluted. this problem has been well known for years to sign up with anything has changed. we took a closer look at this state domains from the swiss company i q,

and we chose average levels of pm to point 5 for more than 7000 states. over the past 5 years, we put it all into a big excel spreadsheet and check that against the list of the world's biggest cities. those with more than 10000000 people living in them. of those 25 cities, it seems like the air has gotten better in order even when levels are still high. what we've seen is that on average, about 5 percent improvement in air quality over the past few years. so we chase help cities that want to tackle the air pollution problems. the causes are similar even when the proportions, very transportation emissions are often number one, not always but. and then also just generally electricity use people cooking with solid fuels and their homes and some parts of the world heating was solid fuels. another major source of air pollution is from industrial sources and then also from weight. so here's what city is that doing to tackle these issues for many cities,

changing how people move around just can make a big difference here. so freaking me from the w h o. again. there was a need to really a push to really have seen are very close, but also fewer legal reason for more working side team. and the, providing most of the transportation was effectively the electric very, to take bank coke. for instance. the city is working on expanding its still limited sky train and metro services. and in the meantime, electric alternatives for the traditional combustion engine trucks that keep looking around admission for you as well. denny is working on an extra fine, 80 percent of his bus suites and even in coca town, sometimes called the diesel capital of the world. a tentative psych, this electric scooter service of starting up. the next steps, so which i says can be introducing so called low emission zones cities that are restricting emissions in a certain part of their city votes to improve their quality, but also to improve quality of life. this might mean only allowing clean

a cars to into or no cars at all. and it might mean transforming speeds to make more room subsets twins, or by sickness. this is something that's resonating across all regions of the world right now. that's really exciting from times square in new york city, being competitive with this through an area to reducing traffic uncomfortable or below horizontal to more by planes and parents are putting cities everywhere. experimenting with a different kind of urban design transport is not the only area seduce, must tackle. there is extra time against air pollution also focuses on industry measuring and reducing the task from construction sides and having more industry shift to feed the fuels and more efficient techniques that converging traditional bank accounts to 6 atkins. this is something a lot of cities are doing like here in the heart process done. the method still uses cold, but much less of it and it traps more of the particular data inside the account, knowing it's emissions. one reason for that is lucky, but uh the space might be that in 2018, the city shut down the by the pool, cold,

tall trend, which was the comfortable for around 10 percent of the cities. particular air pollution are known. one area that progresses still snow is waste, so they don't have the solid waste management vinyl. so 2016. they're still not implemented by reading category has been advocating for clean air for more than 20 years. she found at the mother's active as group worry, a moms who campaign against evolution by petitioning the government and courts throughout india. she says, even when the right policies are that the government often doesn't follow through, we do not segregate the ways to source. and mostly it's all makes. and that is what is making those huge landfills and the mixed race to insinuated in the middle of a city without organized waste connections. funding is awesome. the only option for getting rid of unwanted materials causing toxic smoke full of handful particulate matter that can stretch for miles. so preventing waste as well as collecting and disposing of it better has to be part of any cities time to curve and pollution.

when policies are implemented thoroughly that can have a big impact take facing, for instance, a decade ago, it consistently made headlines for its toxic smoke cover. but in the last few years, it has massively produced its pollution levels. and it's not just basing many of china's mega cities have improved a lot recently. this is the result of what the chinese government holds. a war on air pollution that's focused on all of the causes we've already mentioned, but not least on energy and how people cooks and heat the homes. the city of phasing and polls type limits on emissions from boy that's used in people's homes and subsidized anyone who wanted to upgrade that coal fired boiler to natural gas, which is still a fossil fuels, but produces much less particulate matter for to electricity, which could be produced by renewables. studies show that the 20 percent of the reduction invasions pollution just came from renovating these cold pile, going us outside of china as well. countries around the world are investing in renewable energy, phasing out cold from the energy supply in favor of solar, wind,

and other countries like poland are also getting rid of the coal and wood fired stones. and sol in south korea, which already swept cool. heat is for gas, back in the 19 ninety's is known as causing the switch to more eco friendly heat funds for cooking stove tires with wood or kerosene activity on the option in many parts of the world, especially in rural areas, without access to electricity such as projects from pakistan to rhonda to the millions or introducing cleanest of models to those regions as well. whether and how 5 cities can implement change comes down to a few things. and the 1st total is bits of data. take the hornet impact of some irregular the top solice of the world's most polluted cities. according to the data, it looks like it has improved at least a little. but it's hard to say without any actual changes happened. we haven't really seen any trends that would explain why the numbers are going down. so i

think it's just that the, the quality or data improve is not beat. on march 2016, he found as a pockets on equity initiative, which is a community initiative, a life i ended up individuals. corporations, organizations have come together with low cost monitors and providing that data. a public lea uh on the internet on base that farms that data is what is driving awareness impact of some there are very few equity monitors set up by the government. this makes it hard to judge with that. things are actually getting better thanks to initiative. so there are no more than a dozen sensors in the for a long showing the current air pollution animals. making an honda for governments and citizens take northeast and become monitoring systems a strong up everywhere in the past few years. cities are increasing their ability to monitor their air quality, and this is something that is extremely important. a very positive trends from our perspective. then that's the question of money. changing was able to put

a huge amount of investment into the air quality problem. and that is the key question for a lot of other cities right now. do they have the money to invest, to make such a step change in their air quality? and last but not least, as a political collaboration. so if you imagine air flowing together over parts of the world, that's what we call in the air shot and it doesn't respect political boundaries and found a place like deli, it's extremely important, but neighboring cities and jurisdictions work together on their common problems. cups of, of learning brings in 10 small to now that india, including daily every year after the harvest season. and the same problem happens, for example, in cairo or across indonesia, where smoke cells can reach so far, they affect the air and singapore and parts of malaysia. so cities, regions, and countries will have to work together to change. because this, what we have at the heart of the matter is the health of the people living in

a city. it doesn't really matter where the air pollution is coming from. it's extremely important that it's reduced. so evolution is still a huge issue. big cities all over the world are pretty far from what the w h o consider safe, which would be below 5 microphones per cubic meter of it. but it's can get that done. so that's a tell people that they get this so disciplined us a fixed it's, it's taking me a decade, 0 for us. people like us to be fighting the field and the gods. and coming with such a long re changes happen, social changes in the v, and even when really good air as far away. any change helps any reduction in air. air pollution is goof around and it's more reduction is good. what's more is that the things that clean up there are also good for combustion. climate change, which is likewise fueled by emissions from burning waste and fossil fuels. what would you like your city to do to pin up your yeah, let us know in the comments and subscribe to the channels from over the effect this

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