Sustainable Energy Week. Such a thematic seven-day event appeared in the calendar of city events. This initiative has a very specific background. Recall that in December 2019, the head of the Hrodna City Executive Committee, Mechislav Hoy, signed the "Covenant of Mayors", thus giving consent that our city is voluntarily joined an international project, that already includes about 10 thousand cities. The global goal is the fight for the environment. The specific measures that each of the participating cities must take is to reduce greenhouse gas emissions by a third in the next 10 years.