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Revision as of 07:04, 22 May 2007
A volume graph was probably used so the wildly disparate scales would fit together and still be visible. Its worth noting that using volume to represent quantity is a technique to reduce the apparent difference between various amounts. It seems the amount of solar energy available isn't much more than total consumption, maybe 4 or 5 times at a glance. This is because a casual user expects the only relevant axis to be height and that it is linear. But with a volume graph a doubling of the height means an eight times increase! I was caught out by this until I read the attached text on World_energy_resources_and_consumption#Wind_power_2. See How_To_Lie_With_Statistics for more fun. --Schwern 07:04, 22 May 2007 (UTC)