**Core Concept**
Lead batteries, when disposed of or destroyed, can release various contaminants into the environment. This process involves the breakdown of the battery's components, including lead, sulfuric acid, and other toxic materials. The destruction of lead batteries poses significant environmental and health risks due to the release of these contaminants.

**Why the Correct Answer is Right**
The destruction of lead batteries typically involves the release of lead, sulfuric acid, and heavy metals such as cadmium and nickel. However, one contaminant is not typically released during this process: **Mercury**. Lead batteries do not contain mercury, unlike some other types of batteries, such as fluorescent light bulbs or thermometers. The absence of mercury in lead batteries makes it an exception among the contaminants released during destruction.

**Why Each Wrong Option is Incorrect**
* **Option A:** Lead is a well-known contaminant released during the destruction of lead batteries, as it is a primary component of the battery's lead plates.
* **Option B:** Sulfuric acid is another contaminant released during the destruction of lead batteries, as it is used as the electrolyte in the battery.
* **Option C:** Heavy metals such as cadmium and nickel are also released during the destruction of lead batteries, as they are often used in the battery's components.

**Clinical Pearl / High-Yield Fact**
When disposing of lead batteries, it is essential to follow proper procedures to minimize the release of contaminants into the environment. This includes recycling or properly disposing of the batteries through designated channels.

**Correct Answer:** D. Mercury