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Rob turned me on to this book, Sustainable Energy without the Hot Air.  This is a really good treatment of the world’s energy consumption and production, and how much energy could possibly be produced by various means.  He reduces all energy production and consumption tot he same units, so it’s easy to grok.  The book is free and downloadable in PDF form.

For example, you hear that unplugging your cell phone charger when not in use will save the planet.  Well, your cell phone charger takes 0.5 watts, and if plugged in all the time it takes 0.5 W * 24  hours/day = 12 W-hour/day Driving your car takes about 40 kW, and if you drive for 1 second a day, that’s 40,000 W * 1 s / (3600s/h) / (24h/d) =  46W-h/day.  So… unplugging your phone charger when not in use is approximately equivalent to 1 second of driving.

If unplugging your phone charger when not in use makes you feel good, that’s fine, but don’t think you’ve done your part because you do this.  It’s pissing in the wind.  We need to make BIG changes to have BIG effects.

Another fascinating tidbit:  A single annual intercontinental flight on an airplane that’s 80% full consumes approximately the same amount of fuel & energy as a daily commute of 30 miles in your car!  One flight, and you’ve doubled your annual fuel consumption!