The university's CO2 footprint - a visual representation of Leiden University's environmental impact - is calculated every year. The CO2 footprint for 2020 shows a striking break in the trend in terms of energy use, mobility and waste.

More CO2 in the atmosphere is making food crops more calorific, less nutritious and potentially more toxic.

How much energy and greenhouse gas emissions can Dutch homes save? Xining Yang uses Leiden as an example and shows with his research how enormous the impact can be. At least, if we work harder on becoming more sustainable. Based on the models he developed, Yang will receive his doctorate on 28 June.

Four bachelor’s students in archaeology have embarked on a month-long field school in Aruba. They will work with Harold Kelly, a local archaeologist at the National archaeological museum of Aruba, and with the research team of Island(er)s at the Helm.

How is Young Star Renske Donkers doing now? Early this year she was the second person ever to win the Young Star Award for the best bachelor student. After her bachelor Molecular Science & Technology, Renske is now busy with her master Chemical Process Engineering in Delft. ‘This award was a great boost…

Hydrogen can help to solve the climate problem. At least, if we start producing it in the right, clean way. Leiden researchers mapped out the global environmental impact of hydrogen production and looked ahead to 2050. They published their work in Energy & Environmental Science.

During the summer, staff and students of the Faculty of Archaeology travel to all parts of the world, initiating or joining fieldwork projects. Read some of our students' stories here!

From a meaningless block of plastic to an advanced component that contributes to the energy transition. The technicians and scientists of our faculty think it out in detail and make it a reality. This special project shows that they need each other.

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.

He had been back from Australia for less than 48 hours, but there was no sign of that. Michel Mandjes of MI had the honor of kicking off the very first Tuesday Talks: Science Insights on Tuesday. He did so with a presentation on complex networks.

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.

With the start of June, the annual Leiden Archaeology Field School has begun. Like last year, the Field School takes place in Oss. Every week, a group of 25 first year students gets to learn the ins and outs of a professional excavation.

The sustainable production of hydrogen could potentially be made more efficient by adding a cleverly chosen salt to the process. Researchers at the Leiden Institute of Chemistry (LIC), in collaboration with physicists at the University of Twente, have discovered that the type of salt present in the…

Steel production is likely to take up a large portion of our future carbon budget. Capturing CO₂ from coal-based production won’t solve the problem. Technologies that rely on renewables are more effective, but not enough to get to net zero.

Arbitration law has grown into a ‘sexy’ area of practice about which students are keen to write a thesis and in which many lawyers specialise.

Monday, 3 April, the yearly field school for all first-year students at the Faculty of Archaeology will start. The municipality of Oss is welcoming our 120 students and provides an excellent practical learning stage for the basic skills they will need to master for their professional careers.

Do your interests lie in underwater archaeology and do you have relevant diving experience? Then you might want to apply to an exciting field school taking place this summer in northeastern Germany.

Are magnetic fields older than the first light? And how did they influence the development of our universe right after the Big Bang? Cosmologists from Leiden, Groningen, and Utrecht are now collaborating to investigate this.

The film MعLMIN made by Visual Ethnography alumna Loes Moree will be screened during the fourth Fieldrecordings event. Field Recordings is an annual event for visual anthropology, sound art and landscape film.

Back in June, the annual Leiden Archaeology Field School took place in Oss. For a month, every week, a group of 25 first year students gets to learn the ins and outs of a professional excavation. This is what they have been prepared for in the past year. ‘It is very exciting to put all the theory into…

Innovation through repetition. That is how university lecturer Jurriaan Witteman describes his research on the automatic processing of angry voices in the brain. The original research was conducted 20 years ago, but, with an NWO grant, Witteman is now going to see if those results are accurate.

One day you feel inspired by a field trip, the next you are a speaker at TEDxLeidenUniversity. It happened to International Relations student Alexia. How did she end up on stage – and why did she want to? Alexia shares her story with us. ‘I was given hope, and I wanted to share it with others.’

Training students to become medical professionals is an important task of a university medical centre. But teaching does not always receive the space and recognition it deserves. This needs to change, says Professor Alexandra Langers. Medical education is a profession in its own right.

Assistant professor Anne-Isabelle Richard has received no fewer than three different grants for research and teaching on relations between Europe and Africa.

After years of hard work, Urban Studies graduates were presented with their diplomas. How do they look back on their studies? And what can we expect from them in the future?

Understanding the proces of electrochemical reactions is essential to improve the technology for the energy transition. Fuel cell cars, for example use hydrogen produced from the electrolysis of water. Mariana Monteiro did fundamental research on the process and won two prizes with her thesis.

If European countries rely solely on technological advances, they won't be able to limit global heating to 1.5 degrees. Households will also need to change their lifestyles. This 'inconvenient truth' is the result of calculations done by industrial ecologist Stephanie Cap. ‘It's not a popular message,…