In ancient times, the desert in the Udhruh region in Jordan was transformed into a green oasis. An intricate network of underground water channels was part of an ancient system of water management, storing water and preventing loss through evaporation. Archaeologist Mark Driessen found a new way to…

A huge shiny aluminium object stands in the middle of the Polderlab in Oud Ade. Are the researchers trying to make contact with extraterrestrial life? Certainly not; they are using the ’Moon landers’ to measure whether innovative forms of agriculture reduce greenhouse gas emissions. Fleur van Duin works…

In supermarkets, consumers are drowning in a sea of sustainability labels. Confusing for them, but also farmers can't see the forest for the trees. Obtaining these labels demands an enormous amount of time and effort. Berent Baris is investigating ways to simplify this process, benefiting both farmers…

A new study reveals how ancient Chinese farmers managed soil fertility and water resources over thousands of years. By analyzing carbon and nitrogen stable isotopes in millet crops, the research provides long-term isotopic evidence of farmland management practices in the Guanzhong Basin—the political…

Thijs Bosker, Associate Professor of Environmental Sciences at Leiden University College (LUC) and the Institute of Environmental Sciences (CML), has received funding as part of a large consortium to study the impacts of microplastics on agricultural soils. The project will receive 7 million euro of…

In a new study published in PLOS One, Leiden archaeologist Anastasia Nikulina, together with an international team from France, Denmark, the United Kingdom and the Netherlands, challenges the long-held belief that early humans had minimal impact on their environment before the rise of farming.

Lecture

Lecture, Leiden Yemeni Studies Lecture Series

On Saturday, February 11, 2023, at the Dies for Alumni event, archaeology alumni Everest Gromoll was awarded the LUF Thesis Prize. His thesis, titled ‘Neolithizers by Nurture’, explores parallels between the only two comparable climatic shifts in the history of modern humans: that of the one 12,000…

More severe droughts that will also last longer: this will primarily be a problem for irrigated croplands, as discovered by environmental scientist Qi Chen. Mixed forests with a variety of plant species will be the least vulnerable. Chen compared the effects of drought on different ecosystems across…

In 2011, the University of Hussein Bin Talal in Maan and Leiden University initiated the joint Udhruh Archaeological Project, led by Professors Fawzi Abudanah and Mark Driessen.

The National Museum of Antiquities in Leiden features a small photo exhibition on Mark Driessen's fieldwork research project in Southern Jordan. In this small exhibition you will see a selection of nine photos, made in Udhruh. This ancient Jordanian settlement lies fifteen kilometres east of Petra,…

Nitrogen professor Jan Willem Erisman and Ton Brouwer have released a new report presenting scenarios to actually meet the agricultural nitrogen targets for 2030. Their message to politicians in The Hague: ‘Look at this approach — it is possible.’

Soil that is too wet, or too dry. Or with a lot or few nutrients. Due to climate change, the differences are becoming bigger, and plants must increasingly be able to adapt to survive. How do you make plants more stress-resistant? For this purpose, researchers from Leiden, along with other universities,…

Is polder rice a feasible circular alternative for cows on peatland? A pilot experiment started this week. On May 22nd, researchers from Leiden University and Wageningen University & Research (WUR) planted roughly 3,000 rice plants on the Polderlab near Leiden. The researchers want to test rice as a…

The United Nations fall short in their recently published guide to address hunger without surpassing the 1.5-degree climate threshold. This initial version is a significant step, according to a group of researchers including those of Leiden University. However, they miss an essential topic: reducing…

How does the soil we grow our vegetables in, affects the health of our gut? And does a healthy soil gives crops a better quality and taste? These are some of the questions Soil ecologist Emilia Hannula and a big consortium will work on. With an NWO-KIC grant of 1.8 million, CML, IBL, FGGA, the LUMC,…

Opponents of drastic nitrogen measures argue that the nitrogen calculation model is not reliable enough. Nitrogen professor Jan Willem Erisman: 'It is now much more important to discuss the choices we make on the basis of the outcome. The differences are much bigger than the uncertainties in the mod…

Tim van de Meerendonk explores how farmers, insurance advisors and local politicians in India try to make sense of insurance figures through their moral convictions.

Five thousand years before the common era (BCE), Proto-Indo-European, the mother of many languages that are spoken today in Europe, Central Asia and South Asia, originated in eastern Europe. PhD candidate Axel Palmér has combined a 175-year-old hypothesis with new techniques to demonstrate how descendants…

The Vrouw Vennepolder near Oud Ade has been transformed into the Polderlab. Scientists and students from Leiden University, together with farmers and citizens, investigate how to manage peatland in a sustainable and profitable manner. A great opportunity for students to experience how scientific knowledge…

‘The climate crisis is the greatest threat we face,’ says Leiden University environmental scientist Paul Behrens. ‘And yet, there is hope. In the near future, I think we will wonder why we didn’t make these changes earlier.’

More efficient use of phosphorus fertilisers would make it possible to meet food demand in 2050, without using more of the world’s land for agriculture. This is what environmental scientists José Mogollón and colleagues have discovered by working out various future scenarios for food production and…

Changes to halt further biodiversity loss are more urgent than ever and feasible, says IPBES, the United Nations biodiversity panel. In two reports released this week, the panel calls on governments worldwide to develop coherent policies that address biodiversity, climate change, water, food and health.…

Her father is a miller, so it’s hardly surprising that Esther van der Ent is also fascinated by windmills. Alongside her work at the Centre for Environmental Sciences (CML) and the Leiden-Delft-Erasmus alliance, Esther is now training to become a miller herself. ‘This craft mustn’t be lost,’ she say…

How did people move and form communities when human societies first shifted from hunting and gathering to farming? A new study of the Neolithic period in southwest Asia, the birthplace of agriculture, offers fresh insights.

Lecture

A group of biology students are working on a solution to the world’s plastics problem by getting bacteria to make biodegradable plastic.

Using biomethane to produce ammonia, a crucial chemical in agriculture, could drastically reduce the climate impact of the process. In a study published in One Earth, researcher Robert Istrate shows it’s even possible to make ammonia production net-zero or carbon negative.

Does a communal garden provide cool air and warm neighbourly relations? Does an additional row of trees increase biodiversity? These kinds of questions are key in the COMBINED project, on which Leiden scientists and residents of The Hague, among others, can work for six years with 4 million euros from…

How to take ownership of your career? To find out, students from ‘Design Your Career as a Climate Change Maker’ visited a farmer who has done just that. They learned from him that it’s never too late to start working on something you believe in.

Over the course of the 20th century, politicians increasingly came to rely on experts. Their language was peppered with terms like ‘policy pathways’ and ‘evaluation frameworks’. This made debates more abstract and less ideological.

Soil ecologist Emilia Hannula has been awarded a Vidi grant by NWO to examine how soil could become a promising ally in combating climate change and improving biodiversity. ‘Soil creatures might be invisible’, she says, ‘but they play a huge role in creating a healthy environment.’

For the past 2 years, Dr Letty ten Harkel has been jointly running an excavation project of a suspected Roman villa site on the Balearic island of Mallorca with colleagues Dr Antoni Puig Palerm and Ritchie Kolvers, MA. The project was recently awarded a LUF Chastelain-Nobach fund to explore the extend…

2,240 plant extracts from 1,299 different plant species of Dutch origin. That’s the collection of the Dutch Extract Library, which has recently been transferred to the Institute of Biology Leiden. To plant biologist and contact person for this library Pingtao Ding this is a true treasury. ‘To bring…

‘Wadden Sea Sounds’ is the name of a new project launched by the Waddenvereniging in collaboration with researchers from Leiden University and the University of Groningen. The aim is to find out how underwater noise affects marine life in the Wadden Sea.

The effects of sustainability projects on poorer, marginalised people should be considered at a much earlier stage. This is the opinion of Marja Spierenburg, Professor of Anthropology of Sustainable Development and Livelihood, who will give her inaugural lecture on 25 February.

In 2011, the Udhruh Archaeological Project was launched, bringing together teams of Jordanian and Dutch archaeologists to investigate the region and reconstruct ancient water harvesting techniques in the extremely arid landscape of Udhruh. Access to fresh water remains one of the most pressing global…

Cotton is the most widely used natural fibre for clothes. But how polluting are our jeans and shirts actually? Environmental scientist Laura Scherer coordinated an international research project on the impacts of cotton. ‘The purchases of consumers in Europe can contribute to water scarcity in China…

When following a course on archaeology of the Crusaders, five archaeology students were presented the unique opportunity to create a small exhibition at the National Museum of Antiquities. The coronavirus situation made a complex task even more challenging. ‘We had to work through the lockdown with…