Book excerpt: Economies around the world have arrived at a critical juncture: to continue to grow fuelled by fossil fuels and exacerbate climate change, or to move towards more sustainable, greener, growth. Choosing the latter is shown to help address climate change, as well as present new economic opportunities. This Handbook provides a deeper understanding of the concept of green growth, and highlights key lessons from the experience of green transformations across the world following a decade of ambitious stimulus packages and green reforms.