How is the gherkin energy efficiant?

The Gherkin, officially known as 30 St Mary Axe in London, is energy-efficient due to its innovative design and use of sustainable technologies. Its aerodynamic shape reduces wind resistance, minimizing energy consumption for heating and cooling. The building features a double-skin façade that enhances insulation and natural ventilation, while also incorporating rainwater harvesting and energy-efficient lighting systems. Collectively, these elements contribute to its reduced carbon footprint and lower operational costs.