Destination Rennes on average divides its Internet sites’ CO2 emissions by 4

Actively involved in CSR for a long time, SPL Destination Rennes has just redesigned its websites, including the tourist destination, to reduce its environmental footprint. Designed in a digital sobriety approach, the sites now emit on average 4 times less CO2 emissions [1] . A real challenge in the tourism sector, where photos and videos are numerous and essential to attract more visitors. One month after the launch of its new sites, the objectives are met and even exceeded with 0.30 g of CO2 emitted per page viewed today. Tree structure, navigation experience, accessibility, design, media: a major project that strongly involved the teams of SPL.


Certified ISO 20 121, Tourism and Handicap and labeled Innovative Sustainable Destination, the SPL Destination Rennes has been engaged for several years in a comprehensive reflection on its CSR commitment. An engagement that she continues with the redesign of her websites:,,,

The stated objectives: divide CO2 emissions by 4, be part of the least polluting websites and simplify the online user experience. Objective achieved because the SPL has reduced its impact by 5 tons of CO2, equivalent to 40 round trips Rennes / Paris by car avoided. (source CO2 impact calculator of Ademe:

Supported by the Rennes agency Voyelle, Destination Rennes first consulted representative groups of Internet users to meet this challenge with many lessons learned. This major project took 2 years for the team.

We are proud to continue our commitment to CSR and to launch these new versions of our websites, more virtuous, explains Vincent Aubrée, Director of the Promotion Marketing Department of the Sustainable Destination of Destination Rennes. We wanted to combine our objectives for enhancing the territory and reducing our carbon footprint. With this new web platform designed with our internet users and developed with a view to reducing its impact, we exceed these two objectives and are convinced that users will appreciate their experience. For site contributors, both internal and external, the specifications are strict in terms of editorial and iconographic content. This guarantees us respect for our initial objectives and the continuation of our continuous improvement process.

CO2 emissions divided by 4 on average, thanks to the new version of the sites, simpler and less polluting

The redesign of the sites covers several aspects:

  • navigation experience: by strongly simplifying the tree structure of the sites, Destination Rennes retains the richness of the content thanks to filtering engines to facilitate and specify the searches of Internet users.
  • a more responsible development: the source code of the sites has been totally reviewed to be lightened, faster to load and therefore, ultimately, less polluting. The hosting service provider of the sites is also committed to an CSR approach and ensures the installation of its servers in Île-de-France, reason for Destination Rennes’ choice several years ago already.
  • content: essential for inspiring the Rennais of a day or forever (more than 60 % of visitors to the tourist site live in the Rennes metropolis), the publication of articles, photos and videos has a significant impact on the environment. The lightening of the content represented 500 days of work for the Destination Rennes teams: reduction of the weight of 7,000 images, manual optimization of 2,500 pages and articles, re-indexing of 30,000 URLs. Among the changes, the number of videos has been reduced and they no longer start automatically to avoid the operation of servers permanently
  • respect for personal data: to make a reservation online, it is no longer necessary to create an account. Furthermore, Destination Rennes now uses Piwik Pro, a French tool recommended by the CNIL because it respects personal data. The latter guarantees Internet users that the tracking is in line with the GDPR and that the data remains hosted in France.
  • accessibility: the new version of the websites is adapted to all users and in particular, those with cognitive and visual disabilities. A module makes it possible to adapt the design of the website in real time to simplify navigation by adapting to different types of disability.

About Destination Rennes:
Destination Rennes is a Local Public Company whose shareholders are Rennes Métropole and the City of Rennes and chaired by Sébastien Sémeril, Vice-President in charge of the economy in Rennes metropolis. The SPL’s mission is to reinforce the attractiveness of the Rennes metropolis in terms of urban tourism and professional meetings. Destination Rennes also has the mission to exploit the Couvent des Jacobins, the Rennes Métropole convention center.

[1] This figure may vary depending on the specific content of the site, but remains the objective aimed at by Destination Rennes.

Illustration image: © Destination Rennes

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