However, facilities are responding to the NOX SIP Call at this time and it is uncertain exactly how many facilities will ultimately be equipped with SCR in 2004 when the NOX SIP Call deadline arrives.
The number of SCR-equipped facilities has been carefully planned.
mnli hypothesis: The number of SCR-equipped facilities has been carefully planned. premise: However, facilities are responding to the NOX SIP Call at this time and it is uncertain exactly how many facilities will ultimately be equipped with SCR in 2004 when the NOX SIP Call deadline arrives.