Canada's Prime Minister Stephen Harper has threatened to withdraw funding for the Commonwealth in an escalating row over rights abuses by Sri Lanka ahead of a summit next month.
Australia's weather went "on steroids" over a summer that saw an unprecedented heatwave, bushfires and floods, the climate chief said Monday, warning that global warming would only make things worse.
Japanese Prime Minister Yoshihiko Noda on Tuesday warned of an increasingly severe security environment in Asia amid raging territorial disputes, as he met US President Barack Obama.
The International Monetary Fund warned US leaders that hitting the looming "fiscal cliff" would not only crush the American economy but spin havoc through the rest of the world.
Electricity saving targets came into effect in Japan on Monday as the country eyes a power shortfall over the hot summer, despite the weekend re-start of a nuclear reactor.