Reuters: Norway sees carbon capture and storage (CCS) as a leading weapon to combat climate change and says the Sleipner field where it has buried carbon for 13 years demonstrates the technology is safe. Green groups are skeptical about storing millions of tons of carbon dioxide underground without risking leaks, even though the United Nations believes a fourth of the cuts in emissions needed to keep climate change under control can come from CCS. “There are quite big areas in the North …