Weather a city dweller or a rural farmer, each individual has an environmental footprint. Impacts vary, true; but the single greatest impact -- or non-impact, if you prefer -- in a person's life is continuing his impact for another 3-score-and-ten by creating another human being.
Something I learned in studying environmental ethics was the "I = P x A x T" formula. Essentially, the "I" impact of human activities is a multiplicative function of "P" (population), "A" (affluence; consumption rates for each person), and "T" (technology; how resource intensive the production of affluence is). It's a simplification, but it conveys the major players in environmental impacts. Each of those needs to be addressed to reduce environmental impact. Of the three, the population problem is the one that is least discussed or acknowledged.