the specialist eric stevenson. >> the fire inside my house,. >> right now the level is -- very high. >> reporter: >> reporter: on its way to double the level. how about my barbecue and the smoker i use on weekends? extended exposure which i may have sometimes, eight times the federal standards. >> reactions in the body, harms your lungs, things like that. >> reporter: outside where my neighbors are exposed, it was just exceeding 35micrograms which is the standard. on a spare the air day it would have been much worse. by the way even on a spare the air day barbecue is okay. anything that to do with food is legal. >> a bay area children's choir has been invited to make the world their stage. they have been asked to sing at london olympics. the children are busy practicing for their performance on opening day. the group represents 35 different cultures here in the bay area. they sing in 20 different languages and preform for presidents. the trip is not a done dealt. will cost $4,300 a child to get to the games. about a hundred kids are trying to raise the money by march. >> a woman visi

. >> reporter: eric stevenson is a native of oakland who looks at the air quality. >> i would say that -- at this point ultra final particles is just beginning to be under stood. part of what we want to do is got out in front of the information as much as possible, develop an understanding of what the issues may be and then try to develop the best, most cost effective ways to protect human health here in the bay area. >> reporter: the air board is starting a study of ultra fine particles though it'll likely be three to five-years before it considers new air pollution controls. in some of the pollution authorities say caution is adviced. >> the evidence about the particles in humans, is limited. >> reporter: a doctor said studies indicate the particles can enter the bloodstream and poison internal organs including the brain. >> we need more convincing health data, especially since controlling the particles would be tricky and very expensive. >> reporter: the bay area's air board man said nobody is rushing to regulate. humans have been exposed to the particles since the beginning of time

later, attorney general eric holder speaks at a forum on children's exposure to violence. tomorrow, c-span's rode to the white house focuses on next week's iowa caucuses. at 11:30 a.m., newt gingrich host a town home meeting. then in the afternoon atom 1:20, mitt romney holds a meet a greet in clinton. at 8 p.m. ron paul attends a salute to veterans at the i was sowa state fair. this week on c-span 3, a special presentation of american history tv. wednesday, a look back at politics in iowa. you will hear campaign speeches from barack obama and hillary clinton and mike huckabee. then the 2004 democratic debate in iowa with the john kerry, john edwards, howard dean and others. later, it is the 2000 republican debate featuring george w. bush, john mccain, steve forbes and others. it is iowa politics wednesday starting at 8:00 p.m. eastern. midland high school students videohis year's competition, we want you to tell us what part of the u.s. constitution is important to you. let us know and a five-a minute video. get it to us by january 20. there is $50,000 in total prices. th