The scientific article explains how ecological engineering studies energy and materials in nature to show how human systems rely on nature's resources. It looks at how nature and human activity affect what we produce and the impact on the environment. The concept of ecosystem services, like clean air and water, is used to show the benefits humans get from nature. These services are divided into three groups: supporting services, goods we get from nature, and services related to culture and leisure. The article discusses how ecological engineering and ecosystem services are important for understanding and valuing our environment worldwide.