Sharp, These things are "convenient" because they pass along costs into areas where they aren't as readily quantifiable. Your conveniences come at a cost, at some point we need to ask if those conveniences are really worth the cost. God forbid that someone might not be able to drive a hummer to the grocery store, or commute to work in his Excursion, have to insulate his or her home, turn the thermostat down, use fluorescent light bulbs. Anyway, transportation is only part of the issue, coal use in energy production is a much scarier prospect (use is increasing much faster than oil). Are these things really so important that you missing out on any of them would cause you to loose all regard for the environment? Look at the big picture. No one is asking you to live in a cave, wear Birkenstocks and eat organically grown lentils. Also, no one said global warming would create another ice age (it could alter the Atlantic currents and create a cooling effect in northern Europe).