The price of the shade: green gentrification

For years, Barcelona has been pursuing an objective that is as necessary as it is unquestionable: to confront the climate crisis by reclaiming space for green areas. Superblocks, new green axes, park expansions, green roofs, and the renaturalization of streets are part of a strategy that seeks a healthier, more resilient, and livable city. The benefits are evident: less pollution, lower temperatures during heatwaves, more biodiversity, and a better quality of life.

But this urban transformation also raises questions that often remain outside the debate: who will be able to afford to live in these pacified and renaturalized spaces in a few years? Is it possible that environmental policies will end up fueling the social inequalities they aim to combat?

The answer points towards a phenomenon that is increasingly worrying: green gentrification. When a neighborhood becomes more livable thanks to public investment, it also becomes more attractive to the real estate market. The result is that environmental benefits can end up becoming another factor of pressure on housing.

The underlying problem is that today, in a globalized market, housing has ceased to respond exclusively to a social need and has become, too often, an investment product. In this context, any urban improvement, a park, a pacified street, a renovated square, or a green axis, ceases to be just a public policy to also become a business opportunity. The value generated by collective investment too often ends up being captured by private speculation.

Barcelona is not an isolated case. Perhaps the most paradigmatic example is that of New York's High Line. The recovery of an old elevated railway line gave rise to one of the most admired urban parks in the world and profoundly transformed its surroundings. But it also triggered an intense real estate revaluation that attracted luxury developments, large investors, and new residents with higher incomes, while many neighbors and traditional businesses were forced to leave. The High Line is today a benchmark of green urbanism, but also a warning: without housing policies that protect residents, environmental improvements can end up fueling the dynamics that displace the population.

Barcelona shares some of these risks. The new green axes, the superblocks, or the recovery of numerous public spaces have made the city healthier and more pleasant. It would be absurd to question its benefits. But it is also true that these actions are taking place in a city with an extraordinarily strained housing market, where any increase in urban attractiveness almost automatically translates into a rise in land and rental values.

However, the debate should not be about whether to re-green Barcelona. The answer is unequivocal: yes. The question is where and for whom. Precisely the neighborhoods that most need trees, shade, parks, and quality public spaces are those that accumulate the most social and economic vulnerability. They are also the neighborhoods with less green space per inhabitant, the most exposed to heatwaves, and those that suffer most intensely from environmental inequalities. If we want a cohesive city, re-greening must also be a policy of redistribution and social justice. Greenery cannot be a privilege, it must be a right.

More than half a century ago, the thinker Henri Lefebvre formulated the concept of the right to the city: the right of citizens not only to inhabit urban space but also to participate in its construction and to enjoy it on equal terms. That idea remains fully relevant today. Today, the right to the city also means ensuring that policies to make Barcelona greener do not end up expelling those who have rooted their lives there. It is not just about transforming streets; it is about preserving the communities that give them meaning.

Barcelona has often been an international benchmark in the way of thinking and transforming urban space. Now it has a new opportunity to demonstrate that sustainability cannot be divorced from social justice. Re-greening the city is essential, but so is ensuring that no one has to leave because their neighborhood has become greener. The price of shade can never be gentrification.

Because Barcelona's success will not be measured by the number of trees planted or the square meters of new parks, but by the ability to preserve what makes a city unique: its people. The real challenge is to build a Barcelona designed for its residents, capable of offering decent housing, quality public spaces, and opportunities for everyone. A city that is not just a financial asset or a showcase of urban success, but a lived-in, diverse, and cohesive city. In short, a city to live it and, above all, a city to live in.