Residents of Happyland in Barangay 105 in Tondo, Manila on Monday urged Mayor Joseph Ejercito Estrada to help them remove the stockpile of coal in Pier 18, which they blame for causing various diseases like asthma. Princess Diana de Jesus, 25, said coal dust enter their house. “Our food is laced with coal dust,” she said. City Hall officials, however, remained mum on the issue when sought for comment. Residents said the coal importer, Energies Solutions Inc. failed to fulfill their vow to facilitate the immediate delivery of coal to their clients. The coal importer blamed port congestion for the uncollected coal.