Which of these tips promotes a contaminant-free home?

Promoting a contaminant-free home is best achieved through proactive and consistent practices. Keeping a home contaminant-free involves maintaining cleanliness, regularly servicing appliances, using air filtration systems, and being mindful of substances brought into the home. This choice encapsulates a holistic approach to reducing contaminants, as it emphasizes ongoing vigilance and care in managing the environment in which people live.

In contrast, regularly introducing new pets may introduce allergens or pathogens into the home, creating potential health risks. Avoiding air fresheners might reduce exposure to synthetic fragrances, but it does not address other potential sources of contamination in the home. Using only natural materials can help limit some contaminants but is not a comprehensive solution on its own, as other factors also contribute to household pollutants. Therefore, the most effective strategy is to maintain an overall commitment to cleanliness and a contaminant-free environment, as encapsulated in the chosen answer.