Designing a multi-sector strategic plan.
To cut Paris’ carbon discharges by 50% between now and 2030, then by 80% by 2050 (excluding air travel), our study proposes that action be taken on several fronts.
Parisians must adopt new mobility habits (carpooling, carsharing), give preference to public transport, cycling, walking and also home working, in order to eventually halve the current car fleet.
Next, combustion engine vehicles should be converted, and clean vehicles (electric, hybrid) should be widely adopted.
All these measures, plus those taken incidentally for freight, would help to achieve an 85% reduction in transport-related emissions, with very positive effects on air quality and urban comfort.
Change energy model
Paris, like other cities, will be a catalyst for the transformation of the electricity mix and the disappearance of fossil fuels.
Among the solutions envisaged are photovoltaic panels on the roofs of Paris, alongside underground heating and cooling networks to make better use of geothermal energy, solar energy and the water of the Seine.
As regards the residual emissions from fossil fuels, these will have to be offset by large solar PV farms (50 km2 in total) and wind farms (around 3,000 turbines) deployed outside the city walls, within an "energy catchment area".
Residential and tertiary buildings, responsible for 28% of carbon emissions, must be renovated. We also recommend stepping up the pace of energy efficiency work on social housing (5,500/year compared to 4,500 currently) and private co-owned properties (2,400/year, i.e., twice as many as today).
In addition, we will have to further develop shared housing and collaborative work spaces.
Lastly, we strongly believe in bio-sourced building materials, such as wood, capable of capturing carbon and limiting the emissions associated with the act of building or renovating, also preferring short supply circuits, and material re-use chains.