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.
The Union army's victory at the Battle of Antietam encouraged the president to issue a preliminary proclamation on September 22, 1862, that announced the abolition of slavery in areas occupied by the Confederacy effective January 1, 1863.