Magnesium is lighter than aluminum, and improves its abilities to be welded or fabricated: essential to creating lighter and stronger auto and aeroplane parts. Finding a way to produce it from the residue from other mines is significant. Guy led all environmental aspects of the implementation of a $10 million pilot plant that produces commercial magnesium ingots using between 43 and 70% less energy – and decreasing GHG by over 19 tonnes per ton of magnesium. The pilot plant opened in January 2017, initially generating primary magnesium from mining residues and since January 2018 to recycle secondary magnesium. Next up: building an 11,700 t/year demonstration plant in 2019 and a 50 000 t/year commercial plant in 2022.