Agence France-Presse: US President Barack Obama on Sunday urged world leaders to step up efforts for a "strong" climate agreement at year-end talks in Paris.
"In just two months, the world must unite around a strong global agreement," Obama said in an address to a United Nations development summit.
"All our countries will be affected by a changing climate, but the world's poorest people will bear the heaviest burden -- rising seas, more intense droughts," Obama said.
"We'll be seeing climate change refugees,"...