A public hearing is being held tonight in Danbury on combining proposed bond questions into one ballot measure for several school upgrade and building projects. The City Council met last week to refer the matter to the hearing. The bulk of the nearly $208 million is for the proposed Danbury Career Academy property purchase and construction.  Public Works Director Antonio Iadarola says retrofitting the former Cartus headquarters will save the City money in the long run.  Other bonding is proposed for renovations at Danbury High School, ADA compliance at Hayestown Avenue Elementary and a new roof for King Street Primary. Tonight's hearing is at 7pm in City Council Chambers at City Hall.