Any hope of securing a climate-change agreement at Copenhagen in December on a successor treaty to Kyoto will require close co-operation between America and China.
For decades, European leaders led international diplomatic efforts to try to secure a climate agreement, but were frustrated by the US government's refusal to countenance an international deal to reduce global warming pollution.
With only a few days of formal UN negotiations remaining before the crunch Copenhagen meeting in December, and the world's two largest emitters refusing to give ground, a third way may now have to be found to secure a climate change agreement.
Securing a global climate deal has always faced multiple obstacles.
Businesses would be behind the government in securing a strong climate deal at Paris, he promised.
Finance now threatens to become the main obstacle to securing a global climate deal at Copenhagen, following US and Chinese moves last week to provide targets for cuts in their emissions.
In Paris, the focus will be on securing a global CLIMATE TREATY.
It is astonishing that Cameron has yet to make a single statement on his commitment to securing an international climate change agreement".
The pontiff has spoken before on the effects of climate change but the publication comes at a key time ahead of a UN meeting to decide new "sustainable development goals" in September and crucial international talks aimed at securing a new global climate deal in Paris later in the year.
The UN Secretary General, Ban Ki-moon, has invited world leaders to a major summit in New York this month to put fresh momentum behind the global talks aimed at securing a new UN climate deal at a key summit in Paris at the end of next year.
They must secure a strong climate change agreement to help reduce the climate conditions that make it easier for extremist groups to gain power.
