Buoyed by two significant trade accomplishments, President Trump is heading this week to the World Economic Forum’s annual high-level gathering in Davos, where the organizers have made climate a major focus. Trump is scheduled to deliver an address to the meeting in the Swiss Alps on Tuesday morning, the same day as the teenage Swedish climate activist Greta Thunberg appears on two panels – one on “Forging a sustainable path towards a common future,” the other entitled, “Averting a climate apocalypse.” “How to save the planet” is one of the chosen themes for Davos 2020, and WEF founder and executive...