actually, the cattle industry is arguably the number one cause of global warming, due to cattle's wastes and the deforestation and resources needed to keep the industry going.
on a side note, has anyone given thought to what electric cars will do to bicycling? If I am riding here in the city, and I can't hear a car coming up beside me, that's dangerous. And since electric cars will be very quiet or completely silent, it puts us in more hazard, i think.
-brent