Revolutionary technological development has been assumed to be the cause and basis of the same revolutionary changes in the modern environmental perception of youth. The purpose of the article is to show the changes in youth's sustainable perspectives on environmental issues via information and communication technologies and the changes in sustainable behaviour. The methodology of this study presents the analysis of related topics and qualitative research based on the online questionnaire. The collection of data helped to show that over 80 per cent of modern digital youth use information and communication technologies to raise their awareness of environmental concerns and their preference for the environmental issues that attract them the most by watching or reading the news online. The model of three variables ”awareness – attitude – behaviour”, was proposed. This model can be used to explain influencers and modes of action in the emotional domain of environmentally sustainable behaviour among young people. The study of changes in sustainable behavior based on the example of language and emotional domains in the era of information and communication technologies and may supplement existing research. Research may be of interest to philosophers, psychologists, sociologists, linguists and those concerned with the environmental issues.