Authors start with the idea that environmental resources are an integral part of the economic resources and are becoming scarce, causing the environmental issues to become part of the economic research. Consequently, the modern economic concepts need to be supplemented by the ecological ones: authors approach three recently emerged concepts related to this sphere: circular economy, green economy and blue economy. A close examination of their features leads to the conclusion that they can be integrated into a distinct synthetic approach that the authors have named the “econological approach”, which differs from the traditional economic approaches in its purpose, priorities and periods of manifestation.