Taking the Train Versus Flying There
Wednesday, May 27th, 2009Lately, a lot of environmentally minded folks are touting the train as the best way to travel. As airplanes and automobiles spew out nasty carbon emissions, the train seems like our next best hope to combat climate change, right?

I’ve decided to test out this premise that you and I could save the world by taking the train instead of flying. And truthfully, the numbers are not adding up to create a significant benefit for taking the train. According to Carbonfund.org, the carbon dioxide produced by an individual over 100,000 air miles is approximately 42,000 pounds of CO2, Geez, that seems like a lot, about 0.42 pounds of carbon dioxide emissions per mile traveled.
Now, let’s look at the same 100,000 miles by train. Again, getting our numbers from Carbonfund, 100,000 miles by train will produce a touch more than 44,000 lbs CO2. Wait. That’s more than the damn plane. We’ll put that down for 0.44 lbs CO2/mile.
But wait, that figure for plane travel does not take into account radiative forcing, which is the increased effect of carbon in the higher altitudes. Most people estimate radiative forcing as increasing the efficacy (or warming effect) of carbon emissions by 2.7 — the numbers vary a bit lower and higher depending on who you talk to, but since I’m using Carbonfund’s numbers, I’m also going to use their radiative forcing number of 2.7.
Once you factor in the increase in global warming power that carbon gets when it’s high enough, the 100,000 miles on an airplane now produces 113,400 pounds of carbon dioxide, or 1.13 lbs CO2 per mile traveled. Ouch.
So let’s look at a specific trip, say across the US, from Seattle to Miami round-trip. Going by train is actually going to be a longer trip in terms of mileage (and yes, of course, time) coming in at 7381 miles. That would produce 1.41 tons of CO2 (2820 lbs). Dividing the carbon over the distance gives us 0.38 lbs of CO2 per mile. That same trip on an airplane (5474 miles) produces just shy of 1 ton if you don’t factor in that pesky radiative forcing. But the reality of carbon in the upper atmosphere means that the trip from SeaTac to Miami is really producing what amounts to 2.66 tons of carbon dioxide, which gives us a whopping 0.97 lbs of CO2 per mile.
However, the so-called environmentally-friendly train comes with a cost, both monetarily and time-wise. Let’s say we do take that trip from Seattle to Miami — it would take 3 and a half days, going through Chicago, then Washington DC on the way to Miami. It would cost $672 round-trip according to Amtrak, and that is only for a coach reserved seat. Add in a sleeping car and the new total is over $2,000 and that is only for a “roomette” and only on the longer spans of the trip. $2000 — are you kidding me? Not to mention that money you will spend on food and beverages during the seven days you will spend on the train.
I think I will continue to fly and use the savings to offset my travels. And trust me, I’m as granola as you can get, but come on, spending seven days and over $2000 on a train trip when I could instead fly there in about 13 hours non-stop for under $300 is simply not feasible.
By the way, if you took an automobile with an fuel efficiency rating of 25 mpg that approximately 6,000 mile trip would create about 2 tons of carbon or about 0.67 lbs CO2 per mile. A hybrid with a mpg of 46 would produce just over one ton of CO2, or around 0.38 lbs CO2 per mile.
Huh, maybe instead of the train, we should drive a hybrid. Unfortunately, it would take you seven days (70 mph, 12 hours a day) just to get to Miami. But for shorter distances, I’m thinking that is the highly efficient car may be the way to go. That and you can listen to the radio really loudly and not bother your neighbor.
trains, planes, travel, carbon dioxide, carbon emissions, miles traveled, Amtrak, Carbonfund, hybrid, MPG, carbon emissions, CO2


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