Yes, environmental impact of education is an interesting topic, and it may have negative relationship with environmental sustainability in promoting the knowledge of renewable and sustainable resources.
Pravat, I don't understand your question. Since the word "green" has become a buzzword, appropriated for "green-washing" purposes by corporations as well as by environmentalists and ecologists, its use as an adjective is by no means clear. There have been several discourses relating "green" with education. 1) projects of "green" campuses, i.e., maximizing recycling, minimizing energy use, the replacement of concrete with plants and trees, etc. 2) the introduction of "green", i.e., ecological dimensions, into courses that have ignored them, from anthropology to engineering. 3) the introduction of the analysis of government and corporate policies that have impacts on the environment. 4) Irfan's "promoting the knowledge of renewable and sustainable resources". 5) the incorporation of eco-friendly projects as elements of courses, e.g., participating in various ecology-friendly research efforts by either professors or those outside of education. There are probably others as well. Could you be more specific?
There has to be an intertwined linkage between the pillars of sustainability, economic, environment and social, that it become the central curriculum of "green education". Without these components, greater understanding of "green" among youngsters will notably be short, focusing only on one aspects, and it doesnt comply to the larger requirements of "green" itself. What it means in another words are the importance of integrated "green" can only be achieved through the thorough understanding complexities of challenges in economic(development), socials (people), and environment, to which difference in every places, regions, cities, countries, or even north and south.