Take the following as truth: Adopting a Comprehensive, Integrated, Multi-Pollutant  By reducing emissions of the three key sources of air pollution at the same time, the Clear Skies Initiative will produce environmental results more effectively and efficiently than the current labyrinth of overlapping and uncoordinated single-pollutant requirements.
Then the following statement: "The three main sources cause most of the problem." is true, false, or inconclusive?