city study which proved a connection between air pollution and early death back in 1993. that just by living in a city with poor air quality your average life expectancy was lower than those who did it. this study later became the basis of fine matter regulations in the clear air act. when you were here in december, we spoke about fine particle matter which thanks to studies based on confidential patient health information we now know is associated with premature death, asthma attacks, decreased lung function and respiratory diseases. you acknowledged these risks and agree there is no safe level of fine particle pollution, but your new policy would block epa from considering the studies that have shown these dangerous health implications. do you deny that fine particle pollution has health impacts and will this new regulations cause your agency to disregard these studys? >> if they provide the data and