Complex sentence: The word ecology implies the study of environments: their structure, content, and impact on people, where an environment is a complex message system which imposes on human beings certain ways of thinking, feeling, and behaving.
Split into simpler sentences: The word ecology implies the study of environments: their structure, content, and impact on people. An environment is, after all, a complex message system which imposes on human beings certain ways of thinking, feeling, and behaving.