text: The association of a monetary value with reduced emissions encourages in the 1990 's , scrubber costs decreased by approximately 40 % and scrubber sulfur removal efficiencies improved from 90 % to 95 % , and experimentation led to the blending of fuels to lower emissions .
  
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  In the 1990 's they were able to reduce emissions and also try out new ways of using fossil fuels to create less emissions .