. >> so tthe asthma a rate in w we call cecentral and east harlelem is at one in 4 children. um, and when n you go basasically 10 blocks sououth to the e upper eastside, you find d that the asthma ratete for children isike hahalf of that. >> we house over one third of the new york city's diesel bus fleetet. and when y you fige that we've got 5 depots, each with 200 or more buses, these are depots right across from people's hohomes, uh, from schools, across from parks. >> researches at columbia university found that pregnant african american and dominican american mothers in new york city who are exposed to high levels of airborne pollutants from vehicle exhaust and buburng solid waste gave birth to children who later developed cognitive and behavioral problems. dr. frederica perera led the study. >> devevelopmental l delay at ae 3,3, with cognitive deficicits at age 5, and behavioral problems, including anxieiety, depression, and attention, symptoms of those proroblems, at ages 6 to 7. >> these children also scored more than 4 points lower on standardized intelligence tests a

she runsns a mobile sosolar kiot the cecentral bus ststation ine rwandan cacapital, kigalali.many of the phone users alighting here have been on the road and off-linene for hos.s. claudine's kiosk enables them to charge up their phones or surf the net, couourtesy of solar power.r. >> business is good, i chose this because it's somethining n. ththe fact that they always s e to me e shows i madede a god choice. correspondent: the mobile solar kiosk is the brainchild of this man, henri nyakarundi. the idea was an obvious solution to the situation on the ground, he says. 70% of rwanda's 11 and half a million inhabitants have a mobile phonene. but only 22% have electricity. >> people spend a whole day here. there's no plug, if you lookok around, there is no plug for people to charge. so it's a convenient way for people waiting for the bus to charge their phone, pay a small fee and go on their businenes. or whether we arare in a rurul area the cononvenience sy thte sasame. people don't have time to carry their charger with them, to go to a storere and ask s somebodyw they can do tha