This article analyzes the environmental and sociological aspects in such a relevant topic for 2021 as green energy on the example of a number of countries in Europe and Asia, as a rule, the most developed in this segment. The main attention is paid to the history of formation, the genesis of green energy in each of them, advantages and disadvantages, differences and similarities in the contexts of development and modern functioning both between regions and between neighbouring countries. The main similarities are the limited and compact space of countries, the lack of access to oil and gas resources within countries, the active introduction of scientific and technological achievements. The differences are the following: proximity to the PRC in Asian countries and contact with its contexts, a relatively rapid transition from industrialization and low environmental standards in Asia, as well as the dynamic and advanced pace of development of science and technology in Japan against the background of selected European countries (Sweden, Denmark and Iceland).