NALMCO Certified Apprentice Lighting Technician (CALT) Practice Exam

What is the primary environmental concern related to the disposal of mercury-containing lamps?

1. Reduction of light pollution

2. Contamination of soil and water

3. Increase in greenhouse gas emissions

4. Safety risks to waste management workers

The correct answer is: Contamination of soil and water

The primary environmental concern related to the disposal of mercury-containing lamps is the contamination of soil and water. Mercury is a hazardous substance that can leach into the environment when these lamps are improperly disposed of, such as being thrown in landfills or broken in other waste management processes. Once in the soil or water, mercury can bioaccumulate in the food chain, posing serious risks to wildlife and human health. The other aspects mentioned, while relevant in broader waste management or environmental contexts, do not specifically address the main issue at hand. For instance, while safety risks to waste management workers are a concern, they are secondary to the environmental impact of mercury itself. Similarly, reduction of light pollution and increases in greenhouse gas emissions do not directly relate to the specific risks posed by mercury. Understanding the critical nature of proper disposal methods for mercury lamps helps mitigate these severe environmental issues.