Guardian: Vital UN climate change talks in Copenhagen are likely to collapse unless rich nations agree a “social justice deal” built around equalising emissions per head in each country, according to the former deputy prime minister John Prescott. Speaking to the Guardian, Prescott admitted that the formula would require far greater sacrifices by rich nations, especially the US. Prescott, one of three politicians to broker the original UN climate change deal in December 1997, is to become …