The "Diesel Era" refers to a period in the 20th century when diesel engines became widely used in various industries, particularly in transportation and agriculture. Diesel engines, which operate using diesel fuel, are known for their efficiency and durability compared to gasoline engines. This era saw the rise of diesel locomotives in rail transport and diesel trucks for freight, significantly impacting logistics and commerce. The Diesel Era also contributed to advancements in marine transportation and construction equipment, as diesel engines powered ships and heavy machinery. The increased use of diesel technology led to economic growth and changes in energy consumption patterns, shaping modern infrastructure and industry practices.