Environmental sustainability is a key element of human development and well-being. We depend upon ecosystems to provide the water we drink, the food we eat, and the wood we use to heat our homes. Reliance on these resources necessitates a delicate balance, however. Use too little of those resources and our capacity to meet basic human needs is at risk. Use too much and severe adverse environmental repercussions will likely ensue, including the depletion of resources, ecosystem collapse and increased emissions. Such risks are amplified due to rapid globalization, urbanization, wealth generation, and climate change. Hence, it is not enough to solely evaluate our environment: attention must also be given to the sustainability of the environment.