This document summarizes a lecture about responding to ecological overshoot and moving toward a green economy. It notes that in the 20th century, population increased 4x, global freshwater withdrawals 3x, economic output 22x, and fossil fuel consumption 14x, which is unsustainable. It discusses that Europeans consume disproportionately more of some global resources than their population share. The largest environmental pressures come from food/drink, housing, and mobility. Recycling can only contribute modestly to reducing materials consumption. It advocates managing natural capital and ecosystem services to improve resource efficiency and resilience, enhancing human well-being through a green economy that uses various types of capital efficiently.