Take the following as truth: 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.
Then the following statement: "They were considered about the environment." is true, false, or inconclusive?
Answer: Inconclusive