In developed countries, the two most deadly sources of indoor pollution are _________________
A) synthetic furniture materials and radiation from electronic equipment
B) radon and cigarette smoke
C) pesticides and cleaning agents
D) radiation from electronic equipment and pesticides
E) pesticides and cigarette smoke

Question

Quizplus · Accepted Answer

According to the World Health Organization, the two most deadly sources of indoor pollution in developed countries are radon and cigarette smoke. Radon is a naturally occurring radioactive gas that can seep into buildings from the surrounding soil, and is the leading cause of lung cancer among non-smokers. Cigarette smoke contains a multitude of harmful chemicals and has been linked to various health problems, including lung cancer, heart disease, and respiratory infections. Other sources of indoor pollution, such as synthetic furniture materials and electronic radiation, may contribute to health risks, but they do not rank as high in terms of lethality as radon and cigarette smoke. Pesticides and cleaning agents may also pose health risks, but are generally considered to be more harmful when used improperly or in high concentrations.

In Developed Countries, the Two Most Deadly Sources of Indoor