Reuters: Greenhouse gas emissions by all the Group of Eight industrial nations except Russia fell in 2006 in the broadest dip since the world started trying to slow climate change in 1990, a Reuters survey showed on Friday. Rising oil prices, some measures to curb global warming and a milder winter in the United States in 2006 that depressed energy demand for heating all contributed to an overall 0.6 percent dip in G8 emissions in 2006 from 2005. “It is an encouraging sign that …