With pollution in Pakistan hitting record highs in recent years, citizens clutching air monitors and legal papers are taking the fight for clean air into their own hands.
The world is entering an era of "global water bankruptcy" with rivers, lakes and aquifers depleting faster than nature can replenish them, a United Nations research institute said.
US President Donald Trump descends on Davos for a showdown with European leaders on Wednesday as his bid to seize Greenland threatens to tear the transatlantic alliance apart.
In just 17 months as general secretary, To Lam has swept aside rivals and centralised authority in an aggressive reform drive officials describe as a "revolution".