Feeding a growing global population, estimated to reach 9.6 billion by 2050, in a changing climate without destroying our environment is one of humanity’s greatest challenges. Environmental advocates have a central role in addressing this challenge. This Comment provides a brief overview of the concept of food security, starting with its foundation in the internationally recognized right to food. After providing the legal framework, the Comment describes the meta challenges to global food security, with a particular focus on the environment and the role of legal practitioners.