Simplify the following text for a Grade 9 native English-speaking person.
Original: Silting problems have diminished the Rabat 's role as a port ; however , Rabat and SalÃ still maintain important textile , food processing and construction industries .
Simplified: Silting problems have lowered the city 's role as a port . However , Rabat and SalÃ still maintain somewhat important textile , food processing and construction industries .