CAMBRIDGE, Massachusetts — Lawyers advancing an effort to charge oil companies with homicide over climate-related deaths are ramping up their campaign to hold fossil fuel producers criminally accountable for contributing to climate change. The authors of “Climate Homicide: Prosecuting Big Oil for Climate Death” embarked on a road trip of college campuses this spring, making the case for bringingcriminal charges against oil and gas companies. The push by David Arkush, director of Public Citizen’s climate program, and Donald Braman, an associate professor at George Washington University Law School, aims to bolster support for the theory through presentations at law schools....