A catalytic converter is a device that uses a catalyst to convert three harmful compounds in car exhaust into harmless compounds. The three harmful compounds are: 1  Hydrocarbons (in the form of unburned gasoline).
Answers.comÂ® is making the world better one answer at a time. Slavery ended permanently in Louisiana in 1865. The end of slavery was a direct result of the passage of the Thirteenth Amendment to the Constitution.
Slavery started in what is now the United States in 1619. In that year, a load of slaves was dropped off in Jamestown, the first settlement in what is now the United States. Slavery would continue to exist in the United States until the end of the Civil War, which was in 1865.Slavery came to exist mainly because there was a serious need for labor in the South.he first african slaves were brought over on August 20th, 1619, and slavery wasn't abolished until December 6, 1865 when the thirteenth amendment was passed, I wouldn't say that's exactly when slavery ended but that is the timeline. meaning slavery lasted for 246 years.