Business Green: A Canadian company that plans to colve the problem of coal-based carbon emissions by burning it underground has emerged from stealth mode with $8.5m (£5.7m) in funding. Laurus Energy is hoping to use the funds to advance its work on underground coal gasification projects in North America. The company received the series A funding came from Mohr Davidow Ventures. The technology, which it is licensing from Ergo Exergy, involves burning coal in situ underground by pumping air into …