All European homes, offices and streets must be using energy-efficient lighting, like this dimmable CF Warm Glow bulb, by the end of the decade, EU leaders decided on Friday. (Reuters) The previous day, the 27-nation group agreed to cut their greenhouse gas emissions by 20 percent from the 1990 level before 2020, setting stricter standards than their earlier Kyoto commitment. “If other non-EU states are prepared to collaborate, a target of 30 percent will be considered,” Chancellor Merkel said. (ENN)