Solar hot water

On the roof of the Georges Rigal swimming pool, 350 sq ft (32.5m2) of thermal solar panels have been heating part of the water for the showers since 2010.  They are visible from the central island. The City of Paris encourages installation of solar panels on all types of building. The Cadastre Solaire (Solar Land Register) can be viewed on the website and identifies roofs which have the best orientation for this sort of installation.  The site encourages people to consider the possible use of solar energy in the city, whether thermal (for hot water) or photovoltaic (for electricity).
One way to reduce the area's ecological footprint is to develop the share of renewable energy used.

Ivy and passion flower grow on the façade and at the base of the building.  These plants provide habitats and food for small local wildlife: bees and bumblebees, spiders, snails, birds etc.

Car sharing

Developed throughout the metropolitan area, more than 2500 Autolib' electric cars, more than 2,500 shared electric Autolib' cars are now available for short-duration rentals, with no obligation to return them to the same point.  This new mode of transport has been developed in tune with the city and is available to all. It is a silent option with zero direct emissions (no micro-particles and no exhaust gases), as well as being practical and economical. The 3,000 cars available for hire in the Paris region represent a reduction in private car traffic estimated at 22,500 vehicles or the equivalent of 102,215,560 miles per year (164,500,000 km/year) - 4,100 times the circumference of the Earth - driven by more polluting vehicles. An alternative vehicle to private cars, it causes less pollution, fewer traffic jams and less stress.

A shaded boulevard

During this portion of the walk, the canopy of the trees provides beneficial shade along the avenue. In the summer, they cool the ambient atmosphere, especially through the transpiration of their foliage. Small amounts of water vapour escape from the little orifices - the stomata - on the underside of their leaves. This phenomenon helps limit the effect of urban heat islands.

The 20th arrondissement has nearly 4,450 avenue trees. Boulevard de Charonne is planted with plane trees and sophoras.
At the entrance to Alexandre Dumas metro station, a London plane tree (Platanus x hispanica) is conspicuous by the width of its trunk, which measures 4.15 m (13 ft) in circumference. This remarkable tree was planted in 1880. It stands as a living testament to the heritage of the tree-lined new avenues that were created as part of the Haussmannian plan to modernise Paris. At the end of the 19th century, some 88,000 trees lined the streets of Paris. The main species planted by Haussmann were the plane tree and horse-chestnut tree.
Around the bases of some trees, the permeable surface has been enlarged and demarcated, allowing plants to grow here spontaneously. The pathways created from tree to tree allow small wildlife to move around more easily.
This development is in line with the City of Paris Biodiversity Plan, which focuses on strengthening the Green Network.

High environmental quality public facilities

At 118-122 Boulevard de Charonne, an EHPAD (establishment for dependent elderly people) with 112 beds, a child care centre for up to 30 children, and 6 residential units have been opened.

All satisfy the energy requirements of the Climate and Energy Action Plan, which are adapted to private facilities (retirement homes, homes for the disabled). The compact building gives onto a green square in the heart of the block and the day-care centre is set on the ground floor. On higher floors, the common rooms and living rooms of the EHPAD lead out onto pleasant terraces laid out as "sensory gardens". The decorations and the mouldings of the street-side windows enliven the facade with motifs borrowed from the plant world.

Greening the street

With a Planting Permit in hand, urban gardeners on Boulevard de Charonne have placed flower boxes and grown plants at the feet of certain trees. Individuals can get involved in "greening" Paris' public spaces and take responsibility for a patch of vegetation to beautify it and create a home for biodiversity.

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