What do modern trains use as fuel?
What do modern trains use as fuel?
user
Modern trains usually use a form of diesel fuel.
assistant
So, gas?
user
Gas is an older form of diesel fuel.
assistant
Why use diesel instead of gas?
user
Gasoline engines were common when trains were first developed, and trains still often use them today.  But in recent decades, diesel engines have been preferred because they are more powerful and have lower fuel costs.
assistant
DO diesel engines have more torque?
user