Business Green: The latest round of UN climate change negotiations have resorted to their standard Groundhog Day setting after senior negotiators revealed the week long talks in Tianjin, China are making little progress. Speaking to a handful of news agencies, US lead negotiator Jonathon Pershing said that he was frustrated by the pace of the negotiations. "There is less agreement than one might have hoped to find at this stage," he said. "It’s going to require a lot of work to get to some …