Civil society has been creative, outspoken and even boisterous during the first week of the UN climate summit, despite the official ban on large public gatherings that cancelled a massive march intended to greet world leaders arriving a week ago. If pressure is sustained during the second and final week of negotiations, said former heads of state, business executives and climate justice activists on Sunday, the summit could end up endorsing a long-term target of 1.5 degrees C, an agreement of unprecedented ambition.