QUOTE(yeahmag @ Nov 18 2008, 01:44 PM)
Back to the topic... What I'm really interested in is where is the trade off in C02 emissions and fuel mileage. I see plenty of sites touting that scooters are good for the environment and am conflicted.
On one hand they have excellent gas mileage, but on the other they have almost no modern emissions equipment. The head of the EV Club here at Caltech said in passing he thinks a modern car or even an SUV is *better* for the environment than a scooter.
Discuss...
While I am not sure what a scooter gets for gas mileage, I would look at the entire lifecycle carbon footprint of a modern SUV versus a scooter.
Ask your EV expert that question.
How much fuel is burned to manufacture, deliver and maintain an SUV over its 20 year lifespan (average)
Plus, add in how much fuel is burned by the SUV.
then look at a scooter...the small amount of materials to build it, transport it, store it, and finally run it.
If you look at the overall lifecycle of any product, that is the total carbon footprint, and total emmissions output of that product. Its not a simple question to calculate.
this same arguement applies to EV technology.
Batteries are manufactured and thus create waste, emmisions, and toxic chemicals.
Solar PV panels just now, 30 years after the first panel was made, finally made it to a positive carbon footprint...that is the PV panel creates more energy than it takes to produce the panel over its entire lifespan.
EV cars are the same way...did you save enough carbon over the course of the three year battery life to justify TWO sets of batteries.
Look at the EV over the entire lifecycle and you will see that Gasoline is a strong leader in this space.
It just takes alot of energy to create batteries, and they produce alot of waste.
I am not saying that EV is not overall a better way to go, but you cant compare it to gasoline without factoring in the entire lifecycle when you look at the carbon footprint of any item.
Rich