this is the raw and very real krakow, poland. travel.some, it's a luxurious escape, or maybe an adrenaline-filled adventure. but if you're like me, it's a precious opportunity to discover and to give back. it's time to get real. it's time to get raw. it's time for "raw travel." walking the winding streets,

perera: we've been doing this, the very same -- almost identical study i should say -- in krakow, poland. and we have found similar effects of air pollutants on fetal growth and child development as we've seen in new york city. we've also done a study in china and that study is looking specifically at coal-burning emissions from power plants. so we have three studies that are using similar approaches and studying pregnant women and their newborns and then following these groups of mothers and children to look at longer-term effects of early-life exposures. narrator: all of these studies are being conducted with the hope of gaining a far better understanding of the health effects of toxic exposure, but, more importantly, with the hope of helping affected communities. dr. whyatt: if you identify a problem, you can address a problem. and we've seen that in our study. it's the reason we are doing the study. it's one of the reasons i don't get depressed. because if you can show these things, you can take action to prevent them. i'm a positive person. i've seen a lot of successes. i don't see

krakow in poland pulled out and germany and switzerland considered making bids but didn't because ofc support. let's bring in the publication around the rings. he joins us from dolondon. un-democratic cash records don't need public support, not quite the olympic ideal, is it. >> it's much more easy for these cities to make the promises to provide the guarantees needed for the olympic games, if any don't have to rely on public support, the endorsement of the population that will be supporting the games, yes, makes it much easier to say, yes to the ioc if you're from china or a place like kazakhstan where they won't have referendum that have defeated several of these potential bids for the 2022 winter olympics. >> but does the ioc really want to be in bed with these kind of countries over and over and over again? i know there were some advantages that come over time but this does seem to be a growing trend here. >> well, it's a situation, the ioc would like to not find itself in because it knows in the next few years when either city is selected to host the 2 2022 olympics they'll have