<prompt> Translate the following text to SwahiliAs stated in preamble to the 1997 PM National Ambient Air Quality Standards 40 CFR 50, 1997, the consistency of the results of the epidemiological studies from a large number of different locations and the coherent nature of the observed effects are suggestive of a likely causal role of ambient PM in contributing to the reported effects, which include premature mortality.  <response>: Kama ilivyoelezwa katika utangulizi wa viwango vya kitaifa vya ubora wa hewa ya mazingira ya PM 40 CFR 50 ya 1997, uthabiti wa matokeo ya masomo ya magonjwa ya kuambukiza kutoka kwa idadi kubwa ya maeneo tofauti na hali ya usawa wa athari zilizochunguzwa zinaonyesha jukumu la sababu ya PM ya mazingira katika kuchangia athari zilizoripotiwa, ambazo ni pamoja na vifo vya mapema. 