Our favorite Earth Day maps showcase various initiatives that utilize maps to understand and protect the environment. The CartoDB team has been involved in several projects, including NYC Tree maps, Global Forest Watch, and InfoAmazonia, which provide interactive tools for exploring deforestation, forest change, and supply chain connections. Additionally, LifeWatch INBO's animal tracking maps are a great example of how scientific data can be presented in an engaging way, while also highlighting the impact of pollution through maps produced by Yale's Environmental Performance Index. These projects demonstrate the power of maps in promoting environmental awareness and action, making them perfect for celebrating Earth Day.