Here's why:
* Electrochemical Reaction: A car battery uses a chemical reaction between lead plates and sulfuric acid to produce electricity.
* Byproduct: A byproduct of this reaction is hydrogen gas, which is released as a result of the breakdown of water molecules.
* Safety Concern: Hydrogen gas is flammable, so it's important to keep batteries in a well-ventilated area and never expose them to open flames.
Important Note: A battery also releases a small amount of oxygen gas (O2). However, hydrogen is the primary gas released.
