Asian News International: Warning that climate change was posing "existential" threat to several small countries, the 53-nation Commonwealth today said the upcoming Copenhagen meet should come out with an ambitious mitigation outcome as there was a need for an "urgent and substantial" action to reduce global emissions. Emerging powers of the world join hands China sets green goal, puts India in a hot spot Time to act on arresting climate changes: PM India warns against protectionism under a green label ANIPort of …