maria greco says, every day she worries about the kids getting really sick down the road as a result of what they're exposed to now. >> the walls of crumbling, the white powder comes down. it doesn't smell but it has affected my allergies. it has been linked to headaches so if it's causing problems for me i'm worried that it's causing problems in the kids that i teach as well. i've been in that same room now for four years. and they fix it at least three or four times since i've been in that same room. instead of doing the same thing and wasting the money all over again, they should have just fixed it right the first time. >> fixing it right the first time is something danielle floyd says it already does. >> we have shifted a lot from trying to do singular projects, to taking a more holistic approach the trying to address many issues that occur in a school. what we don't want to continue to do is coming back to a school every two years because we need to fix something. >> reporter: jerry rosen is an environmental scientist and works with the school district. he has documented thousan