In 2020, firms had to adapt to a series of risk events — COVID-19, megawildfires, a devastating hurricane season — engendered or magnified by climate change. Leading Fortune Global 200 firms have used these crises to advance their environmental sustainability performance with new leaders, greenhouse gas (GHG) emission reduction targets, and carbon neutral goals. Business leaders and risk pros responsible for managing risk and seizing market opportunities can use this report to help manage their firms’ environmental sustainability programs.