Final answer:
The most common source of harmful lead in older residential properties is alkyd oil-based paint, particularly in homes built prior to 1960. Lead exposure is dangerous, especially for children, and prevention includes cleaning, safe renovation practices, and proper diet to inhibit lead absorption.
Step-by-step explanation:
The Most Common Source of Harmful Lead in Older Residential Properties
The most common source of harmful lead in older residential properties is alkyd oil-based paint. Lead-based paint was widely used in residential properties before its use was banned by the U.S. government in 1978. According to the Centers for Disease Control and Prevention (CDC), lead paint and associated dust are hazardous when the paint deteriorates or during renovations. This is especially significant in homes that were built before 1960, with the highest percentage of lead-based paint used in homes built before 1940.
Lead exposure can lead to serious health problems, particularly in children, causing issues such as cognitive impairment and behavioral disorders. Preventative measures include regular cleaning to remove dust, using lead-safe certified professionals for renovations, and ensuring a balanced diet that inhibits the absorption of lead. Notably, other sources, such as contaminated water and workplace exposure, also contribute to lead poisoning risks. However, proper identification and removal of lead sources, education, and state and national policies are crucial in preventing lead poisoning.
The erroneous options provided, like appliances, asbestos, and basements, are less common sources of lead in older homes in comparison to lead-based paint. Asbestos, while harmful, is not a lead-containing material, and basements may pose a risk mainly due to potential radon gas accumulation but not typically for lead exposure unless contaminated paint is present.