Evenementen en Festivals zijn voor steden tegenwoordig serious business. Ze zijn bepalend voor het imago van de organiserende stad en ze trekken honderdduizenden bezoekers, voor wie het soms een eerste kennismaking met de stad betekent. Zo ook voor de gemeente Den Haag die haar evenementen prominent inzet als stedelijk marketinginstrument. Daarnaast zorgen evenementen jaarlijks voor enkele miljoenen euro's aan omzet en dus ook voor werkgelegenheid in de stad. De gemeente Den Haag wil weten of haar evenementen milieubewuster kunnen en is op zoek naar praktische mogelijkheden. Tegelijkertijd staat het behoud en de stimulering van evenementen hoog in het vaandel. Daarom heeft wethouder Duurzaamheid, de heer R. Smits aan de Haagse Hogeschool gevraagd een 'Roadmap' voor Green Events op te stellen. Dit in het kader van het 'Partnership Duurzame Transitie Den Haag' De Haagse Hogeschool heeft, ter aanvulling van de eigen expertise, advies- en ingenieursbureau DHV ingeschakeld om de vraag van de gemeente Den Haag te beantwoorden. Een 'Green Event' is een evenement met een uitgekiend milieuplan. Daarbij gaat het om mogelijke maatregelen op het gebied van watergebruik, energie, mobiliteit (hoe komen en gaan de bezoekers) en afval. De Kernvraag van het onderzoek is: Hoe kan op efficiënte en evenementvriendelijke manier een 'vergroening' van de Haagse evenementen worden doorgevoerd?
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Increasing urbanization and the effects of climate change will bring new challenges for cities, such as energy saving and supply of renewable energy, preventing urban heat islands and water retention to deal with more frequent downpours. A major urban surface, the surface of roofs, is nowadays hardly exploited and could be used to make cities more ‘future proof’ or resilient. Many Dutch municipalities have become aware that the use of green roofs as opposed to bituminous roofs positively contributes to these challenges and are stimulating building-owners to retrofit their building with green roofs. This study aims at comparing costs and benefits of roof types, focused on green roofs (intensive and extensive) both on building- and city scale. Core question is the balance between costs and benefits for both scales, given varying local conditions. Which policy measures might be needed in the future in order to apply green roofs strategically in regard to local demands? To answer this question the balance of costs and benefits of green roofs is divided into a public and an individual part. Both balances use a strengths, weaknesses, opportunities and threats framework to determine the chance of success for the application of green roofs, considering that the balance for green roofs on an individual scale influences the balance on a public scale. The outcome of this combined analyses in the conclusion verifies that a responsible policy and a local approach towards green roofs is necessary to prepare the city sufficiently for future climate changes. http://dx.doi.org/10.13044/j.sdewes.d6.0225
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Chemical preservation is an important process that prevents foods, personal care products, woods and household products, such as paints and coatings, from undesirable change or decomposition by microbial growth. To date, many different chemical preservatives are commercially available, but they are also associated with health threats and severe negative environmental impact. The demand for novel, safe, and green chemical preservatives is growing, and this process is further accelerated by the European Green Deal. It is expected that by the year of 2050 (or even as soon as 2035), all preservatives that do not meet the ‘safe-by-design’ and ‘biodegradability’ criteria are banned from production and use. To meet these European goals, there is a large need for the development of green, circular, and bio-degradable antimicrobial compounds that can serve as alternatives for the currently available biocidals/ preservatives. Anthocyanins, derived from fruits and flowers, meet these sustainability goals. Furthermore, preliminary research at the Hanze University of Applied Science has confirmed the antimicrobial efficacy of rose and tulip anthocyanin extracts against an array of microbial species. Therefore, these molecules have the potential to serve as novel, sustainable chemical preservatives. In the current project we develop a strategy consisting of fractionation and state-of-the-art characterization methods of individual anthocyanins and subsequent in vitro screening to identify anthocyanin-molecules with potent antimicrobial efficacy for application in paints, coatings and other products. To our knowledge this is the first attempt that combines in-depth chemical characterization of individual anthocyanins in relation to their antimicrobial efficacy. Once developed, this strategy will allow us to single out anthocyanin molecules with antimicrobial properties and give us insight in structure-activity relations of individual anthocyanins. Our approach is the first step towards the development of anthocyanin molecules as novel, circular and biodegradable non-toxic plant-based preservatives.
In recent years, organizations across Europe, and the Netherlands in particular, have increasingly supported efforts to enhance the sustainability of festivals such as the European Climate Pact, launched by the European Commission as part of the European Green Deal, European Festivals Association and Green Deals Circular Festivals in the Netherlands (European Union [EU], 2025). As a result, festivals across Europe are growing their environmental stewardship and serving as prototypes for wider societal transitions towards sustainability (Calvano, 2024; Irimiás et; al., 2024). However, festival organizers and other stakeholders still face challenges in developing effective communication strategies that truly activate more sustainable behaviour among festival goers (Harms et. al., 2023). Generic, one-size-fits-all approaches are often applied, yet they tend to have limited impact. This is also due to the diverse nature of music festivals, ranging from indoor to outdoor settings, single-day events to multi-day experiences, and from urban to rural locations, all of which shape the audience, context, and communication needs in unique ways (Tölkes & Butzmann, 2018; Dodds et. al., 2020). Essentially, festivals are ideal for informing, experiencing and activating sustainable behavioural change through effective communication before, during and after festivals. It is therefore crucial that a more targeted approach is utilized where messages can be tailored to make communication more effective (Temmerman & Veeckman, 2024). To address pressing sustainable and social challenges within the festival sector, NHL Stenden (NHLS) will collaborate with ESNS and Thansk on a design research project. In partnership with a network of festival organizers, industry professionals, and experts, the project will explore effective communication strategies for sustainability. The goal is to develop an actionable, research-informed roadmap that supports music festivals in enhancing their sustainability communication tailored to the sector’s dynamic and diverse nature.
