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1950s Vs. 2000s: The Drive to Supersize: A lot has changed in the past 50 years, much for the better. Energy efficiency measures, for example, have meant less pollution and savings in electricity ... by erica — last modified Oct 19, 2009 09:56 AM — filed under: Statistically Speaking, energy, low impact, electricity, energy efficiency, Energy Star, population, no impact, pollution — Relevance: 1%