I grew up in a typical suburban home, single storied, lush garden around it. Whether it was the nostalgia of living that life or observation of lower cost of living in a small city, till recently I used to idolise that life, yearned to go back to it - until I started my research into sustainable living! Until I started researching on what "sustainable" living is, I used to assume that since the cost of living in a small city is lower, hence lifestyle there is less wasteful. And on the surface, it indeed was so in India, until a few years back. Until 2010s, most small cities did not have huge malls - the usual evening hangout would be a park or a single screen theatre; roads were much less crowded and small cars would outnumber guzzlers (SUVs) by a quadruple if not more; people bought fruits & vegetables from small shops who'd get supplied by local farmers. Metros or big cities, in contrast, had big malls, roads were clogged - one wasted more fuel idling at the...