The news outlet says the trains are equipped with about 300 boilers that use biofuel pellets, and about 6,000 tons of bio-fuel is consumed each year.
Currently, bio-fuel pellets are used at railroad sections in the Moscow, Northern, South Urals and Northern Caucasian regions.
Russian Railways is said to have plans to completely stop using coal in favor of bio-fuel pellets and electricity, wherever such a conversion is feasible.
An estimated 15 percent of Russia's railroads are not currently powered by electricity, and it is in those areas that coal has been widely used.
However, recent studies have shown the toxicity of the air within Russian passenger railroad cars is five times the admissible level when those cars are heated by coal.
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