Large domes rose out of City Hall Center last week as people thronged for the silent discos, keynote speeches and art exhibitions of HUBweek. The annual creative festival based in Boston explored future possibilities and causes of collaboration with more than 300 artists, entrepreneurs, scientists and organizations across the globe.

Food waste in Massachusetts accounts for over one million tons of waste per year, according to estimates made by the Massachusetts Department of Environmental Protection in 2015. According to the Natural...