Marina is the Executive Director of the Lancet Countdown, and climate change and health researcher at UCL. She trained as a clinical biochemist in the Universidad de Buenos Aires, Argentina, and holds a PhD in biomedical sciences from the University of Cambridge, UK. Her research background spans from toxicology through to environmental health and climate change, and she has previously carried out her research in the Instituto Tecnologico de Buenos Aires, the University of Cambridge, and the Francis Crick Institute. Working as a consultant for the NHS, she led a team of researchers in developing its Net Zero commitments, and is a member of the working group on health co-benefits in climate change mitigation policies of the Superior Health Council of Italy. Link to the lancet countdown project webpage: https://www.lancetcountdown.org/ Link to our latest publication: https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(22)01540-9/fulltext