Reuters: The European Union might be willing to cut greenhouse gas emissions deeper than 30 percent by 2020 if other rich nations join a broad fight against global warming, EU Commissioner Stavros Dimas said on Tuesday. The EU has agreed that it will unilaterally cut emissions by 20 percent below 1990 levels by 2020 and will cut by up to 30 percent if other nations join in. "The EU set a target of 30 percent provided that other developed countries come along — or even more than …