ABSTRACT

This chapter presents the relationship of green economy in the world with the current state of natural environment. Environmentally, the earth system has a hierarchical structure in which energy and material movement with time were involved, for example, “Sun and greenhouse effect,” especially with the increase in population after the Industrial Revolution. Biological interactions of the ecosystem are mainly because of symbiosis. Biological pyramid becomes small enough to go downward. Photosynthesis is specifically a part of material circulation of living things. Earth is one of the planets in the solar system that is third closest to Sun. The prominent feature of the planet is that it has large amounts of oxygen dissolved in the water and air present on the planet. This has facilitated survival of many living organisms, including human beings, and resulted in the huge biodiversity of the planet.