Estra S.p.A., a company operating in the sectors of gas (Estra Energie), electricity (Estra Elettricità), energy services (Estra Clima) and telecommunications (Estracom), has been involved for some time in the world of renewable energies, savings and energy efficiency. It offers exclusive economic benefits to companies adhering to the "Terre di Siena Green" network, for the supply of gas and electricity from renewable sources.


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