Leaving the planet's life-support systems in at least as good a condition as what we inherited. Key Connections and Concepts

Focused on managing and cleaning up pollution after it has been produced.

This consists of the natural resources (like air, water, and soil) and ecosystem services (like water purification and pollination) that support the human economy.

Three additional are often highlighted:

Ecosystems recycle the chemicals needed for life; there is no "waste" in nature.