AAP: The Rudd government has reneged on a commitment to present its 2020 target to cut greenhouse gases to UN climate talks in the Polish city of Poznan this week. Climate Change Minister Penny Wong says it’s important to postpone announcing the target until she releases the final version of the government’s carbon pollution reduction scheme on December 15 after she returns from Poland. But Fairfax says that until late last week Senator Wong repeatedly said the range of emissions …