Reuters: Australia stepped up lobbying ahead of the global climate talks in Copenhagen on Wednesday, with Prime Minister Kevin Rudd accepting a key role as Climate Change Minister Penny Wong heads to Spain for talks. Rudd has accepted an offer from Danish Prime Minister Lars Lokke Rasmussen to become a friend of the Copenhagen summit chair, giving him a key role in helping to forge an international deal to curb Greenhouse emissions ahead of the December meeting. "The leaders engaged by …