Mark is a leading scientist with his main areas of expertise including, causes of past and future global climate change and its effects on the global carbon cycle, biodiversity, rainforests and human evolution. Since the mid-nineties, Mark has shared his deep knowledge through teaching as a Professor of Earth System Science at University College London.

His extensive experience and dedication to his field of work has led to him being published in over 190 papers in journals such as Science, Nature and The Lancet. And to highlight, he was the only climatologist named on the original 2009 The Lancet report on climate change and has since co-authored the annual Lancet countdown reports that started in 2015.

Mark is also the author of 10 books, with his latest release titled How to Save Our Planet: The Facts, published in 2021. He has also written numerous popular articles for titles such as New Scientist, Telegraph and New York Times and has appeared on tv and radio shows including BBC One David Attenborough’s Climate Change: The Facts.

In 2012, Mark co-founded geospatial analytics company Rezatec, who provide AI data solutions to environmental issues for organisations and governments.