BINH DUONG, Vietnam (AP) — Lego opened a $1 billion factory in Vietnam on Wednesday that it says will make toys without adding planet-warming gas to the atmosphere by relying entirely on clean energy.

CIMC-Hexagon, a joint venture (JV) company of CIMC Enric Holdings Ltd and Hexagon Purus, has delivered its first batch of Type IV high-pressure hydrogen cylinders for use in Hexagon Purus’ hydrogen ...