Guardian: The US secretary of state, John Kerry, promised to put climate change front and center of American diplomacy on Monday, raising expectations for this weeks United Nations climate summit.
A day before the first world leaders meeting on climate change in five years, Kerry said he would take it upon himself to make sure the international community steps up to deal with the threat.
This is an enormous challenge, and this is why the United States is prepared to take the lead in order to bring...