Reuters: The G8 rich countries said on Tuesday they want to work with the nearly 200 states involved in UN climate change talks to adopt a goal of at least halving greenhouse gas emissions by 2050. The final climate communique agreed by the Group of Eight leaders at a summit in northern Japan also said mid-term goals would be needed to achieve the shared goal for 2050, but gave no numerical targets. The statement puts the focus of fighting global warming on UN-led talks to create a …