En Medellín (Colombia), los corredores verdes llenos de árboles y plantas ayudan a enfriar el entorno urbano. El proyecto, puesto en marcha en 2016, ha reducido las temperaturas hasta 2 °C en zonas clave y ha ayudado a atrapar la contaminación.

Medellín

Extreme weather events are occurring more frequently amid rising sea-levels and increasing temperatures.

Climate Crisis

In Medellin, Colombia, a unique initiative is effectively addressing the challenge of rising urban temperatures through the development of green corridors. These corridors, filled with trees and plants, were introduced in 2016 to mitigate the effects of the city's increasingly scorching heat. The lush pathways connect parks, roads, and streams, offering a respite from the cement-laden environment. This project has successfully lowered temperatures by approximately 2°C in key areas of the city.

Gardener Irina Montoya, alongside many others, is involved in the upkeep of this extensive network of greenery. The presence of these corridors not only helps in reducing heat but also in trapping pollution. Residents appreciate the transformation, noting improvements in the greenness, safety, and walkability of their neighborhoods. Additionally, the reintroduction of birds and other fauna to urban areas underscores the project's positive environmental impact.

President Estrid Barrera indicates that Medellin's initiative is still evolving, with an emphasis on experimenting with different tree species like mangoes, which are particularly effective at trapping pollution particles. This experience has underscored the importance of innovation and adaption to boost urban sustainability. The success of Medellin’s green corridors has garnered international acclaim, offering a replicable model for other cities seeking to address urban heat and pollution concerns.



Medellín combate el aumento del calor con corredores verdes

Mientras los coches pasan a toda velocidad por la concurrida Avenida Oriental de Medellín, Irina Montoya desbroza una espesa franja de vegetación arbolada que discurre entre los carriles. Forma parte de un ejército de jardineros que mantienen una enorme red de cientos de miles de árboles y plantas por toda la ciudad. Me encanta mantener limpia la ciudad. Me encanta. Y aparte de eso, estas plantas nos ayudan a combatir el calor que sentimos en Medellín. Creo que las plantas son muy importantes y también muy bonitas. Enclavada en un estrecho y profundo valle, la otrora perfecta Medellín, durante todo el año, primaveral, se había convertido en los últimos años en un calor abrasador, hasta que las autoridades locales idearon una solución. Caminos frondosos y arbolados que conectan parques, carreteras y arroyos donde antes reinaba el cemento, conocidos como corredores verdes. Estábamos creciendo muy rápido, construyendo carreteras, infraestructuras, pavimentos y todo eso, y nos habíamos olvidado de nuestros puntos fuertes, nuestras montañas, parques, colinas, que forman parte de la ciudad, y fue entonces cuando nuestra gente empezó a exigir cambios. Desde el inicio del proyecto en 2016, los corredores han ayudado a enfriar la ciudad una media de dos grados centígrados en zonas clave, atrapando la contaminación, entre otros beneficios. Empezamos a ver aves y otra fauna que regresan a la ciudad, de nuevo capaces de bajar de las montañas para llegar y alimentarse en nuestros parques, y tener de nuevo una ciudad conectada con la naturaleza. Los residentes dicen que el corredor ha hecho que sus barrios sean más verdes, seguros y transitables. Además de los corredores, también forman parte del proyecto enormes jardines verticales como éste que ha tenido tanto éxito a la hora de refrescar la ciudad que se ha ganado el reconocimiento internacional. La ingeniera forestal Estrid Barrera dice que ahora se centran en árboles como los mangos que están demostrando ser especialmente eficaces a la hora de atrapar partículas contaminantes. La lección aquí es atreverse, atreverse a cambiar, atreverse a intentarlo. Hemos cometido errores en este proceso. Algunas plantas no funcionan bien juntas, otras han muerto, pero seguimos experimentando y aprendiendo cada día qué especie es mejor y cuál aporta más beneficios, y así es como se puede conseguir el cambio. Aunque todavía son un trabajo en curso, los corredores verdes de Medellín ofrecen un bajo coste, de ciudades más sostenibles, árbol a árbol. Alessandro Rampietti, Algecira Medellín.

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