This lecture explains how skyscrapers have evolved to become more environmentally responsible and climate-responsive. It introduces the ideas of ecological and bioclimatic skyscrapers and shows how tall buildings can reduce energy use while improving comfort for occupants. The lecture discusses important examples such as the Commerzbank Tower and Swiss Re Building by Norman Foster, Bosco Verticale by Stefano Boeri, CapitaGreen by Toyo Ito, and the Walkie Talkie Building by Rafael Viñoly. Key concepts like natural ventilation, sky gardens, atriums, daylighting, double-skin façades, and sustainable structural systems are explained in a clear way, helping students understand how modern skyscrapers respond to climate and sustainability challenges.