injuries. clawson is not gone for the season. he suffered a concussion. moore,e got hurt last week in a game. injured shoulder. dunn, he's out the rest of the season. brian st. pierre gets the call. they say you are the starting quarterback. >> when is the last time he played? >> he's never started a game. he never started an nfl game. he was drafted in 2003. he hasn't played. >> we'll see how it turns out. we're going to have more top stories when "cnn saturday morning" continues. now, the good doctor. good morning. i'm dr. sanjay gupta reporting from kobe japan. converged to discuss an important topic, urbanization. more than half the world's population live in cities. that number is expected to grow.

a lot of attractions to living in the city, but health challenges, as well. how do you disaster proof your city? what about the air we breathe. the sights and stimulations, what is that doing to your brain. we have the problems outlined and more importantly, the solutions. let's get started. we start with the startling statement, the air in many cities around the world is simply too dirty to breathe. in fact, more than a billion people around the world are breathing in toxic air. it's captured attention. the question is what can communities do to protect their citizens and individuals do to protect their health? you are looking at urbanization or the consequences of it. big factories as your neighbors. in kobe, it's a beautiful city but they suffer from pollution

problems like many cities do. we have 15 factories in this small area. add the exhaust from cars, trucks and busses. you get the smog that hangs over the cities. the air is too dirty to breathe. here is the most frightening part. you are likely not to notice it. your body becomes accustoms to it after four days of breathing it in. the tiny particles are smaller than a hair. it constricts the muscles in the airway. it incleess blood pressure, heart attack risk and heart disease. you may think health impacts would take years to develop. it's not the case. on days when you have bad pollution in cities, emergency room visits spike over the next 24 hours. it's not just adults at risk, either. babies are being born pre-polluted with more than 230

chemicals in their system at the time of birth. progress is starting to be made. places in china where i visited, they are moving the coal power plants outside the urban areas into rural areas where fewer people are around. in new york, there are new laws on idling busses and trucks. there are things we can do. drive less, use public transportation. that can help. keep in mind when pollution is at its worse. hot days are worse. during the midday, if you are exercising, you are taking in seven to times as much air and seven to ten times as much pollution as well. indoor air quality can be worse than outdoor air quality. open a window or make sure you have ventilation. these are tips for individuals and society to try to make the beautiful city you live in a

safe and healthy one as well. you can't help but watch something like that and wonder what is the most polluted city on the planet. china. imagine this. spending one day there is like smoking three packs of cigarette. at u.s., los angeles is one of the most polluted cities. coming up next, how do you disaster proof a city against earthquakes and floods? we found out. we'll have that next. [children screaming] [growl] i met my husband here. i got to know my grandkids here. we've discovered so much here together. but my doctor told me that during that time my high cholesterol was contributing to plaque buildup in my arteries. that's why i'm fighting my cholesterol...

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we are back with a special edition of "sgmd" from kobe japan. after the floods in pakistan and after the earthquake in haiti, it got me thinking, how do you reconstruct a country after it suffered so much devastation and how could you prevent the

devastation in the first place? they are questions they are trying to answer in kobe. a good model because an earthquake happened here years ago. would you know what to do if you found yourself in the middle of that? we are experiencing a 6.9 magnitude earthquake. they sago to the corner of a room, stay away from glass, cover your hands and face. get under a table. protect yourself. all of this is just a simulation. that's what you need to do as an individual. given that so many people live in urban centers across the world, how do you recover and rebuild after something like that? it's the question they were asking themselves in kobe, japan. a 6.9 magnitude earthquake like that, 20 seconds in length. builds gone, 5,000 lives lost and a lot of work to do to

rebuild. kobe did it. now, they serve as a model for the rest of the world. don't put all your disaster resources in one area. try and engage the survivors of an earthquake as much as possible in the rebuilding process. hospitals, they have to be able to stay open and functioning, even after an earthquake. the buildings. the awful images like this one. 200,000 went down. this was one of them. take a look at what it looks like now. this is the same building rebuilt after the earthquake. they use materials to try to isolate the building from the ground and the shaking that accompanies an earthquake. they use metal plates to allow the building to move and sway if the ground is shaking. it is not perfect. about 80% of the city is now rebuilt. there are problems still. naow thoroughfares like this

are tough to navigate making rescues difficult. the balance is there. trying to maintain what's been for 100 years in the middle of the reconstruction. one of the things, it's human nature to wait for a tragedy to occur before you do anything about it. it's true of things like earthquakes. it's true with our own bodies. sometimes we wait for an illness before we are reminded to take care of ourself. it's what they are trying to address in kobe, japan. pre-planning of a natural disaster whether earthquake, floods or all the things happening around the world. there are things about living in a city that are attractive to people. what can you do to keep your brain as uncluttered as possible? i'll give you a hint. the answer is behind me. stay with "sgmd."

life in the concrete jungle, it's what they call it. if you live in a city, you are used to something like this. the problem is with so many distractions, it's hard to focus on one thing. it's called controlled perception, toggling back and forth between different things and leaves you feeling mentally exhausted. living in a city has options. shops and cultural attractions. what we are finding more and more is all of that comes with a price. there's an impact on the brain as well. here in japan, it's a big topic of discussion. mental illness is one of the biggest health problems here and they attribute it to the high-tech environment. sue said rate in japan is among the highest in the world. more people live in cities than ever before. they are living in cities longer than ever. all of us expect it to get worse.

here is why. all the stimulation causes spikes to the stress hormone known as cortisol. reduces self-control, dull thinking and may speed up cognitive decline, just from living in a city. think of it as your brain more rapidly ageing. here is the part i like in all this. getting away from the stress associated with the kay yacht of the big city is as simple as finding a place like this. glimpses of green area make huge differences. it makes you less distracted, less stressed and more relaxed. we found this place minutes from kobe, japan. people come here for a few minutes a day. there are shrines and good opportunities to find green space. that's the key. find green spaces in your city and use them as much as

possible. while i was in japan, i decided to explore another interest of mine, acupuncture. i have been fascinated by it for some time. it's a tradition of chinese medicine. in japan, 40,000 people are practicing this art. back in the united states, it's been much more popular. about 3 million people using acupuncture regularly. 150,000 of them are children. insurance is covering this for a lot of people as well. we decided to say hello to him. thanks for having me. >> welcome. >> this is where you practice? >> yes. >> how long have you been practicing here? >> ten years. >> patients come here. these are the needles? >> yes, they are all disposable. >> the patients come to see you for what? >> muscle pain and joint pain. any other internal problem like a digesting problem.

allergic problem. even psychological problem, a depression or something. >> headaches, i understand as well. >> yes. >> this is a model. this is what you use for your pressure points? >> yes. >> can you talk me through this? >> you mentioned a migraine. >> yeah. i suffer from migraines. >> okay. i would use this point to around here to make your circulation better. >> these meridians are what you are focused on. >> right. >> the lines here. >> right. >> you find a pressure point that could be well away from where something hurts, but putting need iles there makes a difference. i do suffer from headaches. you were showing the pressure points. what do you do? >> for example, i have to check

points. let me try. >> can i try this? can you show me what you would do? >> sure. sure. >> you want me to lie back. >> can you lie down on your back? >> i'm just checking the condition of the points. so, it's quite common example for migraine. okay. the thickness of the needles, like your hair. so, very thin. >> very thin. okay. >> very thin. >> you're okay? >> yeah, i feel fine. okay, it's coming now. >> so, i feel it. it did not really hurt going in. >> okay. >> you feel it? >> i feel it. >> a pain or -- >> it's sharp. >> i see. i'll give you another one.

>> sure. >> all right. >> i say hesitantly. >> so, most people wouldn't get any benefit right away. it would take some time. >> sometimes right away, sometimes it takes next day or, you know. a couple days. >> all right. so that's a good example of what -- >> yes. yes. those points are under one same meridian -- >> a line going up. >> that's right. >> quickly, why do you think it works? >> why? okay, you know, okay. we have so many meridians.

like 14 meridians. 20 kinds of meridians. in all the meridians goes to all your organs. they cover the whole of your body. then, so now i give you this and this and this point and this point. those two points are very popular for, you know, a program or upper here. located up here. >> you are trying to restore balance, is that right? >> right. >> you have ying and yang? >> that's right. >> this is fasz nating. i know people put dozens of needles in for a treatment. we'll see how this works. thanks. >> no problem. thank you.

we are back with sgmd reporting to you from kobe, japan. looking at the urbanization of our planet. one thing i've always been curious about is why do people in some parts of the world live so much longer than in others.

here in japan, they have one of the highest life expectancies of anywhere in the world. and what doctors will tell you, it doesn't have to do with genetics as it does with the environment and specifically diet. fish. it's a big part of the diet here. in fact, fresh fish available in markets like this every single day. and people come up and eat a lot of this fish. there are certain types of fish that people pay particular attention to. but you have obviously crab over here, big clam, small clams, but there are certain fish that are particularly good in terms of increasing people's life expectancy. mackerel, for example, salmon, another great fish. but fish people eat every single day, one to two servings a day, compared to the united states where they eat a serving per week. something they're focused on is omega 3 fatty acids. something that decreases risk of heart disease, your chances of developing clogging in the arteries, decreases your chances

of stroke. by the way, tuna, as well, over here. tuna another good source of the omega 3 fatty acids. the price is expensive, about $8 to $10 for that piece of tuna. but it's the omega fatty acids that seem to make a difference. they continue eating that fish throughout their entire lives. also, other types of foods, seaweed, for example. find it pretty easily over here. it's a great source of antioxidants. a lot of people hear about omega 3 fatties a iy s ies a acids an great. that can help meet your requirements for omega 3 fatty aci acids. 1 to 2 servings per day here in japan as compared to one serving per week. here the rates here are about half of what they are back in the united states.

you know, there's something else they told me about here in japan, which i think is really important, as well. and that is this idea that you push the plate away before you're entirely full. you never stuff yourself. here in japan, they call that hara hachi bo. it's good advice whether you live here in japan or anywhere else in the world. we have much more "sgmd" right after this. [ male announcer ] this is rachel, a busy mom. she starts at dawn and so does her back pain. that's two pills foa four hour drive. the drive is done. so it's a day of games and two more pills. the games are over, her pain is back, that's two more pills. and when she's finally home, but hang on,

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and we are back with a very special edition of "sgmd" reporting to you from kobe, japan. what a fascinating week it's been trying to look at lessons learned. the idea is urbanization. and by the year 2030, they expect that number is going to go up to 60%, 3 out of 5 people living in cities. so how do we make ourselves safer, healthier, more prosperous? there's lessons all over the world. for example, in mumbai, they

recognize that simply being a pedestrian, even not during an earthquake, can be a dangerous thing. so creating walkways, sky walks, like the ones you see there, keeping those pedestrians safe. that's a model. also in brazil, recognizing you can't always find green space and tranquility, so they're going to the second largest city into some of the poorest neighborhoods and giving those neighborhoods more than just a fresh coat of paint. and nigeria recognizing that sanitation so important you've got to protect yourselves and the air and water pollution that is such a big problem in so many cities. and back here in kobe, you know, again, they suffered a significant earthquake 15 years ago. the rebuilding has been such a process here, but they did it, they did it quickly, and they made the city safer and better than it ever was before. one of the things it's a little bit non-intuitive is this idea of incorporating communities. after the earthquake, they incorporated the survivors and always really expected the elderly. making sure, for