Recycling of post consumer plastic waste is problematic in that the environmental benefits are questionable and the costs are significant. It would be better to separately collect the most useful parts through the expansion of the deposit system.

LAPP student Heidi Kaarto and project leader Esther Kentin published an article on the right to regulate in relation to an EU ban on microplastics in a special issue on plastic regulation of Review of European, Comparative & International Environmental Law.

Nano-plastics cause malformations. Meiru Wang, researcher at the Institute of Biology Leiden, looked at the extreme effects polystyrene nano-particles could have, using chicken embryos as a model. Her results were quite alarming. Especially as nano-particles are everywhere. In the air, floating through…

A team of students from Leiden and Groningen took the second prize at the European final of the BISC-E sustainability competition. Last June, the team had already won the Dutch finals. The students came up with ‘Suckerspheres’, a natural alternative to the plastic micro-particles that are still frequently…

The analysis of protein residues extracted from the storage containers of circa 50,000 year old bone-tools reveals Neandertal strategic selection of bovid ribs to make some of their “lissoirs”.

We explored how to morphologically classify well-resolved jetted radio-loud active galactic nuclei (RLAGN) in the LOw Frequency Array (LOFAR) Two-metre Sky Survey (LoTSS) using machine learning.

An image has great powers of persuasion. It is said that ‘a picture is worth more than a thousand words’. But these days, images can easily be manipulated with severe consequences. ‘Perhaps it’s time to reconsider the value we attach to images’, says Elize de Mul, whose PhD thesis deals with ‘digital…

Promotor: Prof.dr. M.K. Richardson, Co-Promotor: F. Witte

Current clients

The Grachtwacht (Canal Watch) conducts research on urban wildlife and the impact of plastic on nature. With our clean-ups, we not only collect waste, but also data. This way we try to find out the source of the waste and turn off the tap on shore. This way there is structurally less plastic in the c…

Below you will find an overview of the publications of The Leiden Advocacy Project on Plastic.

Former clients en projects

Mapping out the problem of plastic pollution requires a lot of data over a large area. That's why scientists are increasingly turning to volunteers for help, also known as citizen science. But what are the challenges for a researcher when he or she involves the public in research in this way? Four Leiden…

Microplastics are small pieces of plastic found in the environment. At CML research have been conducted in the distribution of these plastics on beaches around the world using citizen science. In addition, CML is conducting in depth case-studies in the Caribbean and along the Dutch coast. Follow-up…

This is the team of LAPP:

Auke-Florian Hiemstra is the Leidsch Dagblad Person of the Year 2022.

Several media published articles on the latest research from a team including Thijs Bosker, Associate Professor Environmental Sciences, last week. The research has shown that whales in the vicinity of Auckland New Zeeland consume three million microplastics a day.

This year Leiden University exists for 444 years! This will be celebrated together with the residents of Leiden and The Hague during various activities. One of these is scientists and residents doing research on plastics and psychology together.

What is better for waste recycling: a plastic, paper or ceramic cup? A bio-based or fossil-based coating? Waste sorting at the source or at a recycling facility? Ask ten experts and you will get ten different opinions. We can all agree on one thing: doing nothing is not an option. Thus, Leiden University…

The world is becoming clogged with plastic, with tiny plastic particles found everywhere, from the oceans’ depths to the mountain tops, soil, plants, animals and even inside us. The question is: what harm, if any, are they causing? In a new article on The Conversation, environmental scientists Meiru…

In this project we ask: how does pollution manifest as part of different practices, both socially and materially.

What motivates citizen scientists in the Schone Rivieren project to contribute? How does their motivation, attitude and knowledge change over the years? Are there differences in motivation and attitude between different groups of volunteers (clean up vs. monitoring; long-term vs. short-term)?

Join the Pipe is a project committed to reduce plastic waste and to provide people both in the Global South and in the Global North with drinkable water.

Join the Pipe is a project committed to reduce plastic waste and to provide people both in the Global South and in the Global North with drinkable water.

Roll your sustainable sleeves! Our students and staff have found various ways to do just that, both at home and at our university.

What happens to the different waste streams?

Dutch archaeologists are making three-dimensional virtual reconstructions of archaeological objects lost in the Syrian civil war.

We are very excited to announce our Sustainability Series for 2023-2024. Each month an interactive workshop will be organised that discusses a specific theme of sustainability. Interested about sustainability? Do not hesitate to sign up to our events !

Nanoplastics can accumulate in developing hearts, according to a study by biologist Meiru Wang from Leiden University. Her research on chicken embryos sheds new light on how these tiny plastic particles pose a threat to our health.

The cases of building materials, automobility, mushrooms and plastics.

From where litter ends up to which languages are spoken in Leiden and The Hague: over 50 interesting, surprising, complex and entertaining questions were sent in for the Citizen Science project to mark our 444th anniversary. Not one but two Citizen Science projects will be starting this year in Leiden…

Four Master's students Science Communication & Society made two podcasts on the theme Plastic for the end project of their study programme. With the podcasts, they helped the Institute of Biology Leiden (IBL) to draw attention to plastic pollution. And that was harder than it seemed. 'Be sure to test…

Leiden academics Remco Breuker and Auke-Florian Hiemstra stand to win the title of Person of the Year.

How dangerous are micro- and nanoplastics? Do they affect the environment? What harm can they do to our bodies? Questions that we can now finally answer because of Fazel Abdolahpur Monikh. Together with his colleagues, he developed a method to detect and quantify nano-sized plastics. Their paper has…

What is the effect of pesticides, fertilizers or plastic on water quality? And how do wind and rain affect the data? These are just some of the things that Leiden environmental scientists study in the 32 ditches of the Living Lab.

The cargo lost at sea as a result of the MSC Zoe disaster should be considered environmental pollution and information about it should be made public. This was the case made by Leiden Law School’s Leiden Advocacy Project on Plastic (LAPP). Following their investigation, the government has finally decided…

Canal Watch (De Grachtwacht), which has been cleaning canals since 2018, has received the Dutch Research Council (NWO) Communication Initiative Award.

The opening of the Academic Year 2017-2018 took place on Monday 4 September 2017 in Pieterskerk church.

Below you will find an overview of all PRE-Classes provided by the various programmes of Leiden University. For each section, you can find a description of the content and more specific information about the requirements for participation in the Class.

My PhD thesis investigates the ecological significance of resistance against drought-induced air bubble formation inside the water conduits of plants (embolism), and the plasticity and functional aspects of stem anatomical traits in woody and herbaceous species.

Have you spotted the special voting bins on campus yet? Send us your suggestions for challenging, non-scientific questions and who knows? Your burning question might just be the next butt-kicker!

Defending your PhD research in front of nearly 300 elementary school students: that was the challenge faced by PhD candidates Jo-Anne Verschoor and Marinka de Willigen during the VUURVLIEGEN competition organised by the Centrum JongerenCommunicatie Chemie (C3). After an exciting competition, the children…

New technology offers many new possibilities for research, such as on dementia. ‘Organ-on-a-chip’ is a new technology in which small bits of organ are grown out of stem cells on a small plastic plate. A small piece of blood vessel, heart or nerve offers many new possibilities for research, such as…

Netwerk en projecten duurzaamheid verduurzaming green office en green team

Fighting against cancer, antibiotic resistance and disposable plastics: Ahmed Ali, Fredj Ben Bdira, and Valerio Barbarossa receive a LUF grant for their innovative and socially relevant research. These grants for academic talent are often an important step towards grants by NWO and other grant insti…

Toen in 2019 honderden afvalcontainers in de Waddenzee vielen, wilde de overheid geen informatie vrijgeven over wat er in de containers zat. Vijf jaar later weten we eindelijk meer, nadat hoogleraar Esther Kentin beroep deed op de Wet Open Overheid.