 Despite this, Icelanders emitted 16.9 tonnes of CO2 per capita in 2016, the highest in the EU and EFTA, mainly resulting from transport and aluminium smelting.Nevertheless, in 2010, Iceland was noted by Guinness World Records as "the Greenest Country", reaching the highest score by the Environmental Sustainability Index, which measures a country's water use, biodiversity and adoption of clean energies, with a score of 93.5/100.On 22 January 2009, Iceland announced its first round of offshore licences for companies wanting to conduct hydrocarbon exploration and production in a region northeast of Iceland, known as the Dreki area.