What are the environmental disadvantages of trains?
Fuel combustion, track abrasion and freight leakages cause the most soil and plant contamination, because their emissions are neither chemically, or biologically degraded. Similarly, heavy metals found in the water bordering the tracks are often caused by leakages from petroleum products carried on the system.
“When you take into account the production of railroad equipment and tracks, all of that is very carbon intensive as well,” says Hamilton. “Take the entire picture and trains are actually more polluting than the road buses, even though buses all run with dirty diesel fuel.”
According to EPA data, freight railroads account for just 0.5% of total U.S. GHG emissions and just 1.7% of transportation-related GHG emissions. Moving freight by rail instead of truck lowers GHG emissions by up to 75%, on average.
However, as an energy researcher, my decision was motivated by the fact that trains, whether for cargo or passengers, pollute much less than airplanes, sometimes by as much as 73%, and they are more easily electrified than planes.
Pollution comes from the diesel (used north of Edinburgh where electric trains cannot run) and electricity that the trains consume while moving along the East Coast mainline. Diesel releases the greatest amount of carbon, while the electricity we consume from the overhead line has a much lower carbon intensity.
Dedicated Infrastructure Is WastedBut high-speed rail lines can only move people, making them far less cost-effective. To save energy, high-speed rail cars are far lighter than conventional rail cars and cannot be safely used on the same tracks as frequent heavy freight trains.
In the classic version of the problem, a train is barreling down a track at five people. You're in position to throw a switch, diverting the train to another track where it would only hit one person. So here's your choice: Should you let the five people die, or make an active choice to kill the one person?
Science says taking the train is better for your health than driving to work. If you have a choice to drive or use public transportation, research suggests you should take the train. Studies show that driving 10 or more miles a day takes a severe toll on your body — mentally and physically.
Trains. Besides walking and biking, traveling by train remains one of the greenest and most environment-friendly options when getting around. Regardless if electric or diesel-powered, trains emit between 66 and 75 percent fewer carbon emissions when compared to cars and airplanes.
If we take an overall view of the transport sector, 71% of transportation related carbon emissions come from road users, whereas only 1.8% of emissions stem from rail travel. So in absolute terms, trains are responsible for a lot less emissions than cars.
Trains are particularly low-carbon ways to travel. Taking a train instead of a car for medium-length distances would cut your emissions by around 80%. Using a train instead of a domestic flight would reduce your emissions by around 86%.
One of the biggest environmental benefits of trains is that they consume far less energy than other types of transport. It takes a huge amount of fuel to get a plane carrying hundreds of people airborne, whereas trains are streamlined, require much less energy to move, and are increasingly able to run on electricity.
Subway systems, light rail transit and freight trains can send loud train noise into neighborhoods. Organizations such as the World Health Organization and the U.S. Environmental Protection Agency have set guidelines for noise level decibel limits for rapid transit.
Locomotive exhaust stack fires can occur when diesel fuel is not burned properly or the stack and spark arresters are not cleaned periodically. In such cases, sparks may come out of the stack and could drift into flammable material on the right-of-way or beyond the right-of-way.