By Kate Abnett BRUSSELS (Reuters) -The European Parliament will decide on Wednesday whether to block or accept an EU law labelling investments in gas and nuclear power plants as climate-friendly, which has exposed deep rifts between countries over how to fight climate change. The parliament will decide whether to veto the European Commission’s proposal to add gas and nuclear power plants to the European Union “taxonomy”, a list of economic activities that investors can label and market as green in the EU. EU officials expect a tight vote. A total of 353 lawmakers – just over half of the 705 in…