ecological - adjective (Environment) Concerned with ecology or green issues; hence, environment-friendly, environmental. Etymology: For etymology, see eco- and ecology. History and Usage: Ecological has developed in very much the same way as environmental during the past ten years, developing the sense 'concerned with environmental issues' in the seventies (see ecology below) and the more elliptical sense 'environment-friendly' in the early eighties. It seems it can already be economical (though surely not ecological) to fly cargo to London for onward trucking to Paris and points east, and vice versa. Guardian 19 June 1990, p.
15 History and Usage: Ecological has developed in very much the same way as environmental during the past ten years, developing the sense 'concerned with environmental issues' in the seventies (see ecology below) and the more elliptical sense 'environment-friendly' in the early eighties. It seems it can already be economical (though surely not ecological) to fly cargo to London for onward trucking to Paris and points east, and vice versa. Guardian 19 June 1990, p. 15