Ecosystem services refer to the benefits that humans receive from ecosystems like provisioning of food and water, regulation of floods and disease, cultural services and supporting services like nutrient cycling. The document discusses how ecosystem services underpin human well-being and economic activity but are often not accounted for in conventional economic systems. It provides examples of how considering ecosystem services can help transition to a "green economy" by changing policies, accounting systems, and incentives to better reflect natural capital values. Integrating ecosystem services into decision-making can help reduce costs, create new markets and business opportunities, and lead to more sustainable use of natural resources.