The coronavirus has halted what seemed like a collective awareness to achieve the longed-for ecological transition, but it is time to resume this unpostponable debate. The priority for action and change is the metropolitan areas that have emerged from uncontrolled urban expansion, whose design is irregular and dispersed. Redesigning cities to reduce their environmental impact is imperative in our time, which is becoming increasingly scarce.

Metropolitan areas are currently undergoing a process of transformation. Their rapid development in recent decades has not always been planned. This results in alarming figures in terms of low density, isolated growth and speed of transformation.

It is necessary to respond to climate change with energy and environmental planning. This requires a revision of current urban planning to include sustainability criteria. Especially when we are going to live in an increasingly urban world.