in honor of Dr. Klineberg's spring break hybrid purchase

Here are a few hot debates online regarding the most efficient of the fuel efficent auto choices:

Treehugger: Which is better for the environment- a Prius or an Echo?
(spoiler: a Prius, but only after 12,000 miles of driving)


On hybrids vs. biodiesel | Grist Magazine | Ask Umbra | 14 Mar 2005
(spoiler: biodiesel is judged more sustainable b/c gas is gas--evil petroleum--even at lower levels of usage)