 Chris Huhne has won the support of six other European governments to push for a toughening of the EU's climate targets, to be discussed in Brussels today. The energy and climate secretary is spearheading a growing movement in favour of a target of 30% cuts in greenhouse gas emissions by 2020, instead of the current 20%.  He will join his counterparts from Germany, Spain, Sweden, Denmark, Portugal and Greece to argue for the higher target at a meeting of all 27 member states.  In a letter to the Guardian, Huhne and his fellow ministers say: "at a time when the price of oil is soaring, putting in place an ambitious p lan for Europe's low-carbon future has wider benefits than tackling climate change. It will increase the continent's resilience against oil price spikes and reduce its dependence on imported energy. and it will help Europe compete with emerging economies in the fast-growing markets for green goods."  The push was boosted last week with publication of the EU's 2050 low-carbon roadmap, which showed the EU was on track to reduce emissions by 25% by 2020, if current policies were fulfilled.  The roadmap said a cut of 25% would offer the most cost-effective way for Europe to meet its 2050 target of cutting emissions by at least 80%. as the EU has already cut emissions by 17% compared with 1990, a 30% target would "stimulate the right investment in low-carbon infrastructure and technology", according to the environment and energy ministers.  High profile opponents of the higher target within the European Commission include Gunther Oettinger, the energy commissioner, who said it would lead to "faster de-industrialisation".