Lanetta Haynes Turner (top right), chief of staff to Cook County Board President Toni Preckwinkle, walks commissioners through new spending initiatives on Thursday.

New proposals to create a non-police “alternative” response system for mental health emergencies, protect vulnerable areas from the ravages of climate change and accelerate the replacement of lead service lines were among new priorities laid out by Cook County officials on Thursday as they map out spending for the county’s $1 billion share of American Rescue Plan Act funds.