<prompt> Translate the following text to EnglishIdadi kubwa ya uwezo mpya wa kuzalisha, inayojumuisha zaidi ya vitengo vya mzunguko wa mchanganyiko wa gesi, imejengwa ndani ya miaka kadhaa iliyopita.  <response>: A large quantity of new generating capacity, consisting mostly of gas combined cycle units, has been built within the last several years. 