Going after the big four | MIT Technology Review

Going after the big four | MIT Technology Review: When Yet-Ming Chiang ’80, ScD ’85, heard the call for proposals for MIT’s Grand Climate Challenges, he knew fairly quickly where to look for ideas. “There are four industries that, together, release almost half of the industrial emissions in the world, and those are cement, steel, ammonia, and ethylene,” Chiang says. “And these four together…