Text: 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.
Entailment: They need to reduce pollution from three main sources.
Contradiction: There is only a single problem that causes air pollution.