Sustainable living is "not viable outside cities" says Hélène Chartier of C40 Cities

In a recent discussion with Hélène Chartier from C40 Cities, published by Dezeen and authored by Jennifer Hahn, the pressing issues surrounding sustainable living in urban environments were explored. C40 Cities is a network dedicated to promoting sustainable urban practices among some of the world's largest cities. Chartier, who leads zero-carbon development initiatives, emphasizes the crucial role cities play in addressing climate change and housing the growing global population.

Chartier asserts that urban living is the most sustainable option available for reducing emissions. With 55% of the global population residing in cities, which contribute to 60% of emissions, the significance of urban centers in creating a sustainable future cannot be overstated. The report from the UN's Intergovernmental Panel on Climate Change (IPCC) highlights that cities must become greener and more resilient to the climate crisis.

The conversation highlighted the need for proper infrastructure in cities to support sustainable lifestyles. Chartier notes that the required infrastructure for a low-carbon life is often unattainable outside urban areas. To effectively implement this infrastructure, a certain level of population density is necessary, enabling efficient public transport systems, cycling routes, and sustainable energy management.

The IPCC report warns that cities have not sufficiently prepared for climate change, and poorly planned urban growth significantly exacerbates global warming. Buildings account for roughly half of a city's carbon footprint, making it imperative to focus on eliminating emissions associated with energy use and construction materials. Chartier emphasizes architects' responsibility in designing buildings that will contribute to a more sustainable future.

C40 Cities is working on initiatives like the Reinventing Cities competition, which aims to innovate urban spaces through 49 experimental developments across 19 cities. This approach encourages the creation of compact, self-sufficient neighborhoods, referred to as 15-minute neighborhoods, where essential services are easily accessible by walking or cycling. This urban model aims to limit sprawl, reduce travel distances, and thereby lower emissions.

Chartier advocates for the incorporation of nature-based solutions in urban planning, such as green roofs and permeable surfaces, to manage rainwater and reduce local temperatures. The necessity for green spaces is highlighted, with recommendations for local bylaws that mandate greenery in new developments.

With the increasing vulnerability of urban areas to climate impacts, Chartier calls for climate change risk assessments to be integral to all building projects. This includes evaluating hazards associated with various emissions scenarios. She urges a ban on construction in high-risk areas, such as flood plains, and encourages designs that incorporate greenery and passive cooling methods to mitigate heatwave impacts.

Hélène Chartier's insights outline the urgent need for cities to adapt to climate change while promoting sustainable living. With a focus on infrastructure, architectural responsibility, and nature-based solutions, urban areas can play a pivotal role in combating global warming while accommodating an increasing population. The C40 Cities initiative aims to guide cities towards achieving their net-zero goals, ensuring a sustainable future for urban living.