Add Yahoo as a preferred source to see more of our stories on Google. German Chancellor Friedrich Merz has delivered a blunt message to European allies: the old world order "no longer exists" and has been replaced by a far more uncertain landscape shaped by great power rivalry and a renewed focus on national interests.

Add Yahoo as a preferred source to see more of our stories on Google. The UN's climate chief on Thursday urged countries to unite against an "unprecedented threat" to international cooperation from pro-fossil fuel forces -- issuing the appeal as US President Donald Trump rattles the global order.