two trains are on the tracks next to each other two trains are traveling down the tracks next to each other two trains are on the tracks next to each other two trains on a train track with a train station in the background two trains on the tracks with smoke coming out of them two trains on a train track next to each other two trains are on the tracks next to each other two trains on a train track next to each other two trains are traveling down the tracks two trains on the tracks next to each other two trains are traveling down the tracks two trains are traveling down the tracks two trains on the tracks with smoke coming out of them two trains are traveling down the tracks two trains on a train track with smoke coming out of them two trains are traveling down the tracks next to each other two trains are traveling down the tracks two trains are on the tracks with smoke coming out of them two trains are on the tracks with smoke coming out of them two trains are on the tracks with smoke coming out of them two trains are on the tracks next to each other two trains are traveling down the tracks two trains are on the tracks with smoke coming out of them two trains on the tracks next to each other two trains are on the tracks next to each other two trains are traveling down the tracks two trains are on the tracks next to each other two trains are traveling down the tracks two trains on the tracks with smoke coming out of them two trains on a train track with smoke coming out of them
The steam engines are smoking down the tracks. Smoke billows from a locomotive going down the tracks.  Two trains are on a set of tracks running parallel to one another. A train travels down rail road tracks creating massive pollution. A train blows smoke while on the track. 