used to say that sth is what you would like to happen or what should happen, but you know it cannot :
In an ideal world we would be recycling and reusing everything.
used to say that sth is what you would like to happen or what should happen, but you know it cannot :
In an ideal world we would be recycling and reusing everything.
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005