redOrbit: Yvo de Boer, head of the UN climate convention, said nations signing up to the accord reached at last month’s summit would not have to do so by the deadline of January 31, BBC News reported. Originally, the “Copenhagen Accord” asked countries to send figures by the end of the month on how much they will curb emissions, but uncertainty over who is going to sign up has led the climate convention head to call the deadline “soft”. De Boer said the Copenhagen summit had not …