Extreme weather events are rising in frequency and intensity, disproportionately hitting poor countries and communities.
Flooding, the worst of the impacts globally, continued to affect the largest number of people, more than 35 million.
Dire environmental challenges and climate change took center stage at the World Economic Forum's annual gathering.
The charismatic statesman from Ghana, who spent virtually his entire career as a U.N. administrator and rose to become the world body's first Black African U.N. secretary-general, has died, his foundation announced in the Swiss capital.
Beyond the repercussions in Washington and Beijing, international organizations said the tit-for-tat tariffs will undercut a broad array of global development efforts.