MEDELL??N - COLOMBIA, MAY 10: A view of the green wall in Medellin, Colombia on May 10, 2022. The Colombian city advances in its attempt to be a model city of sustainability, ecology and mobility consistent with the environment, it hopes to win a Guinness Record with the construction of a new green wall of more than 1875 square meters and with more than 80 thousand planted species. To this is added the enormous urban forest of Medell??n that captures 11,000 tons of carbon dioxide per year and 115 tons of other pollutants, according to a study by the EIA University, in 2014 there were 400,000 trees registered in the city today in day are a little more than double. The city's strategy to win the Lee Kuan Yew World City international award, considered the Nobel Prize for cities, is to generate sustainable mobility with a subway system and bicycle circuits, different green walls in building structures and the city's subway, having in the digital development building of the city one of the largest green walls in the city, finally several green parks become examples of sustainability for the rest of the world. Jorge Calle / Anadolu Agency/ABACAPRESS.COM