By Kate Abnett BRUSSELS (Reuters) -Investments in some gas and nuclear power plants would be labelled as sustainable under rules proposed by European Commission on Wednesday, a plan that has split countries and investors, and which some lawmakers will attempt to block. Brussels has taken more than a year to decide if gas and nuclear energy should count as green investments in the EU’s taxonomy, an investor rulebook designed to help raise massive amounts of private capital to meet EU climate change targets. In final rules published on Wednesday, gas power plants would be labelled green this dec…