Greta Thunberg: A Year to Change the World is a three-part documentary series following the climate change activist Greta Thunberg from August 2019 to late 2020, when she was aged 16–17. She travels North America and Europe, hearing experts talk about the complex and diverse effects climate change has had, including damage to forests, the retreat of glaciers, ocean acidification and flash flooding. The series also explores methods to combat climate change such as carbon capture and helping wetlands and mangroves to flourish, but finds that such solutions cannot be rolled out fast enough to be the only part of a climate change mitigation plan. Additionally, Thunberg speaks at conferences, meets the natural historian David Attenborough and attends climate strikes. Plans for filming in other parts of the world were abandoned when the COVID-19 pandemic restricted travel from March 2020 onwards.