    Sehtehce ‘Whi percentage of electricity    “was made by steam: turbine ithe 19908? -              Sentence 2 The’ main use. for: ‘steam’  ‘turbines is in  electicity generation, tin the  19908: about 90% ‘of theworld’s electeic  praduction was y use of steam turbings)-  however the recent wi lespread appl ication:  of large gas “turbine units “and” typical.  ‘combined cycle power: plans has’ resulted:                   