What rating would experts in risk analysis give to indoor air pollution? 

A)  It is a low-risk health problem for humans. 
B)  It is a medium-risk health problem for humans. 
C)  It is a high-risk health problem for humans. 
D)  It is a high-risk ecological problem for humans.

Indoor Air Pollution

The presence of pollutants in the indoor environment resulting from sources like household cleaning agents, cooking, tobacco smoke, and building materials, leading to health issues.

Risk Analysis

The systematic process of identifying and assessing potential risks and their impacts, often to manage and mitigate potential harmful effects.

Health Problem

Any condition that affects an individual's physical or mental well-being, ranging from minor illnesses to chronic diseases.