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Green Urban


Cities will be key to a low carbon, resilient global economy able to address and adapt to climate change. Many are emerging as leaders cutting emissions and greening infrastructure. Photo ©Pline

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Diego Martínez, Ana Gutiérrez and Juan Pablo Mayorga are the young authors of "Small" (Pequeño), a short film about a bike tour in Mexico City during which the protagonists search for individual solutions to climate change. From planting vegetables in a courtyard to building a solar-powered house, this film showcases how small, personal activities and behavioral changes can play a crucial role in transitioning society into a clean and sustainable future. At the beginning of the film, the authors explain their main motivation for producing the film:

We are part of a generation of people who ask themselves about the way they live, because every activitiy, even producing this film, has consequences for the planet

"Small" is one of the 230 films from 70 countries submitted to the Action4Climate film contest. The winners will be announced later this year. You can watch all the films running the competition on YouTube.

Cities, key climate actors

Mexico City is one of the largest cities in the world, home to more than 8 million people (or 20 million taking into account the wider metropolitan area), and a good example of how cities can be key actors in taking climate action. According to the Intergovernmental Panel on Climate Change (IPCC), urban areas are proportionally more affected by climatic disruptions, and are also responsible for 70% of energy-related greenhouse gas emissions.

Cities played a central role in the Climate Summit hosted by UN Secretary General, Ban Ki-moon, in September. This is a summary of the main inniciatives announced at the Summit on climate action in cities:

  • Mayors from around the world, including New York, Seoul, Paris, Johannesburg, Bogota, and Copenhagen, announced the signing of the Mayor’s Compact that will harmonize their members’ targets and strategies.   
  • Among the over 2,000 members of the Compact, 228 cities have voluntary targets and strategies for greenhouse gas reductions. If implemented, these targets could help avoid up to 2.1 gigatonnes of greenhouse gas emissions every year.
  • City networks also announced a harmonized approach and a platform to reduce city emissions which will help coordinate efforts to combat climate change and make them more transparent.

Read all the Summit´s results on cities.

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