<prompt> Translate the following text to SwahiliThe authors of the Clean Energy Future CEF report describe their analysis as an attempt to assess how energy-efficient and clean energy technologies can address key energy and environmental challenges facing the US Brown, et al, 2001.  <response>: Wanahabari wa Clean Energy Future CEF wanaelezea uchambuzi wao kama jaribio la kutathmini jinsi teknolojia za nishati safi na ufanisi wa nishati zinaweza kushughulikia changamoto kuu za nishati na mazingira zinazokabiliwa na Marekani. 