Paris, Rabi'I 01, 1437, December 12, 2015, SPA -- US President Barack Obama says on Twitter that the acceptance of a global climate agreement is "huge." "Almost every country in the world just signed on to the #ParisAgreement on climate change - thanks to American leadership," he says, according to dpa. --SPA 22:11 LOCAL TIME 19:11 GMT www.spa.gov.sa/w