promotion of technological innovation in renewable energy, and was joined by over 250 start-ups from 30 countries in 2015. In 2014 and 2015, Enel was included in the STOXX Global ESG Governance Leaders index, an index that measures a company's environmental, social, and governance practices. Enel took part in Expo 2015 in Milan as an Official Global Partner. With a 29 million investment, as well as building its own pavilion, Enel built a Smart City over the entire Expo area, simulating a city of 100,000 inhabitants with a total energy consumption of 1 GWh per day. The Smart City comprised a smart grid for the distribution of electricity, an operations center for the monitoring and management of the smart grid, an information system that allowed visitors to view in real-time the electricity consumption in each pavilion, charging stations for electric vehicles, and LED lighting of the entire exhibition site. During 2016–2018, Enel carried out a series of operations aimed at digitising and innovating the Group, with particular attention to sustainability. In January 2016, Enel launched the “Open Power” brand, which presented the company with a new visual identity and a new logo. The concept of “openness” became the driver of the Group’s operative and communicative strategy. In June 2016, Enel presented the Enel Open Meter, the 2.0 smart meter designed to replace first-generation electronic meters. Open Meter was designed by Italian designer and architect Michele De Lucchi. In July 2016, Enel launched an Innovation Hub in Tel Aviv to scout 20 start-ups and foster collaboration, while offering a personalized support programme. In December 2016, Open Fiber completed the acquisition of Metroweb Italia for €714 million. In March 2017, Enel inaugurated the Innovation Hub at University of California, Berkeley, an initiative for start-up scouting and collaboration development. In April 2017, in joint venture with Dutch Infrastructure Fund, the company launched the largest “ready-to-build” solar PV project in Australia. In May 2017, Enel launched E-solutions, a new global business line to explore new technologies, as well as to develop products. In July 2017, Enel joined Formula E for the first zero-emission event in the championship’s history in New York. In September 2017, Enel ranked 20th in Fortune’s 2017 “Change the World” list and became one of the top 50 companies in the world – and the only Italian company – to have a positive social impact through business activities. In the same