Her work focuses on sustainability, in relation to climate change, energy, food and agriculture, biodiversity, air pollution, deforestation, and public health.

[5] She left Edinburgh to start a research position at the University of Oxford, where she developed data visualizations to communicate information.

[3] Ritchie's early work considered food systems and how it was essential to adapt to meet the Sustainable Development Goals.

Her work focuses on environmental sustainability, including topics such as climate change, energy, food and agriculture, biodiversity, air pollution, and deforestation.

[12][13] In 2022 Ritchie was named Scotland's Youth Climate Champion at the Holyrood Green Giant Awards in recognition of her contributions to the climate-change movement.