Ideas unleashed by Dorchester ‘hackathon’ for kids

BOSTON – Ask a bunch of pre-adolescents to come up with solutions to some vexing issues and they'll likely deliver some surprising answers, just as a group of students in Dorchester did.
For example, one team developed a car engine that consumes carbon dioxide, burns methane and emits oxygen as a way to combat climate change. Another group designed a homeless shelter run by robots, to cut the costs of helping the down and out.