Assembling together countries, industry and research institutes, the Strategic Energy Technology (SET) Plan has been bringing together public and private investments to make the clean energy vision a reality on the ground. Launched in 2007, the SET Plan now stands at an important junction, writes Miguel Arias Cañete.Miguel Arias Cañete is the EU Commissioner for climate action.The transition towards a low-carbon economy, as we tackle climate change, is one of the biggest opportunities of our time.