The EU is set to release an ambitious new climate change road map, Microsoft briefly overtakes Apple as the most valuable company in the world and GlaxoSmithKline nears a deal to sell its nutrition business to Unilever. Plus, what to watch for as leaders from 20 of the most powerful countries in the world meet for a dramatic G20 summit in Buenos Aires on Friday. See acast.com/privacy for privacy and opt-out information.