The battle of the billionaires has become the stuff of headlines. The world’s richest man, Elon Musk, has gone head-to-head with Australia’s richest man, billionaire Andrew “Twiggy” Forrest. Musk, the founding investor in battery-powered car giant Tesla, has famously mocked hydrogen fuel-cell vehicles as “mind-bogglingly stupid.” Forrest has just placed a very large bet on […]