Narva open-pit mine. Since 2003, several new mines were opened: the Põhja-Kiviõli open-pit mine in 2003, the Ubja open-pit mine in 2005, and the Ojamaa underground mine in 2010. By 2006, after 90 years of major mining in Estonia, the total amount of mined oil shale reached one billion tonnes. The exhausted Aidu open-pit mine was closed in 2012, followed a year later by the Viru underground mine. In 2004, two power units with circulating fluidised bed combustion boilers were put into operation at the Narva Power Stations. Construction of the Auvere Power Station, located next to the existing Eesti Power Station, began in 2012. In the end of 2012, the Ahtme Power Station was closed. In 2008, Eesti Energia established a joint venture, Enefit Outotec Technology, with the Finnish technology company Outotec. The venture sought to develop and commercialise a modified Galoter process–the Enefit process–that would enhance the existing technology by using circulating fluidised beds. In 2013, Enefit Outotec Technology opened an Enefit testing plant in Frankfurt. Kiviõli Keemiatööstus began to test two Galoter-type retorts in 2006. Eesti Energia opened a new generation Galoter-type plant using Enefit 280 technology in 2012. VKG Oil opened three new Galoter-type oil plants called Petroter correspondingly in December 2009, in October 2014, and in November 2015. In 2020, Eesti Energia announced a plan to build additional oil plant by 2023. At the same time, it cancelled a shale oil pre-refinery project developed jointly with Viru Keemia Grupp. In spring 2021, the government coalition of Estonian Reform Party and Estonian Centre Party put a political target in their coalition agreement to stop oil shale power generation by 2035 and using oil shale in the entire energy sector by 2040 at the latest. Shortly after, Eesti Energia announced it will stop burning oil shale for electricity generation by 2025 and burning oil shale gas by 2030. It will close older type shale oil plants by 2040 while in newer generation shale oil plants oil shale will be replaced with waste plastics. Estonia is negotiating with the European Commission to receive €340 million support from the Just Transition Fund to mitigate the impact of the oil shale industry transition. Economic impact The oil shale industry in Estonia is one of the most developed in the world. The National Development Plan for the Utilisation of Oil Shale 2016–2030 describes oil shale as a strategic resource. Estonia is