A series of low-carbon urban quarters are part of Reinventing Cities, a global competition that aims to help cities eliminate carbon emissions.
The global organisation, which now has 97 member cities that together represent a quarter of the global economy, is managing the competition.
“We have got the building permits and they are starting,” said Chartier.
C40 Cities launched the competition four years ago “to drive carbon-neutral and resilient urban regeneration”.
Winners were chosen on the basis of the ambition of their strategies for reducing whole-lifecycle emissions including both embodied carbon – emissions generated during construction – and operational carbon, which covers emissions caused by the building’s use.
Sixty-five per cent of winners aim for net-zero emissions and the remainder are targeting reductions of over 50 per cent.
“The competition said you have to strive for zero carbon,” said Chartier. ‘They had to make a carbon assessment including a lifecycle analysis of their projects. Some are better than others.”
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Designed by architects Atelier Georges, Tatiana Bilbao Estudio, Serie Architects and Bond Society, the 35-hectare site in the east of Paris aims to reduce lifecycle emissions by 85 per cent through the use of local biomaterials and on-site renewable power generation.
Reykjavik project Lifandi Landslag will be Iceland’s largest timber building while Oslo development Recipe for Future Living aims to reduce construction emissions by 90 per cent by recycling materials.
Entrants were encouraged to “go for local offsets and not just buy them.” In Milan, the L’INNESTO project designed by Barreca & LA Varra “aims to achieve carbon neutrality in 30 years thanks to a low-carbon district heat network”. It will also make use of pre-assembled construction technology and bio-sourced materials.
The Porte de Montreuil project in Paris will be powered by on-site geothermal and solar plants, which will also provide power to neighbouring areas. Unavoidable emissions will be offset via a carbon fund that will allow it to “go beyond the carbon neutrality goal”.
The project will additionally feature a superstructure that is 80 per cent cross-laminated timber. Facades will be entirely made of local bio-sourced materials including terracotta bricks and hemp.
Four-fifths of the materials used will come from the Paris region while all spaces will be flexible, allowing them to be used for different purposes in future to avoid the need for demolition.
C40 Cities plans to launch a second Reinventing Cities competition later this year.
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