The boom-and-bust of environmental-technology investing has settled out, and money is flooding in—both individual and institutional. We examine the green fields that lie ahead. Many Arab countries have long been suffering an exodus of medical professionals—a problem only magnified by the pandemic. And a reflection on the life of Jonathan Sacks, a tirelessly unifying British rabbi. For full access to print, digital and audio editions of The Economist, subscribe here www.economist.com/intelligenceoffer