For climate scientist Li Xueke, the decision to leave the University of Pennsylvania for Hong Kong was a pivot to the front lines of the global green economy. As climate change turns the Arctic into a seasonally navigable ocean, Li’s research on critical new shipping routes could shed light on the economic impacts of a warming planet. Li joined City University of Hong Kong (CityU) last month as an assistant professor in the school of energy and environment, following a decade of study and work...