Final answer:
The most effective way to reduce exposure to existing formaldehyde levels in the home is all of the above options given in the question.
Step-by-step explanation:
The most effective way to reduce exposure to existing formaldehyde levels in the home is all of the above options given in the question.
Increasing ventilation with fresh air helps to dilute and remove formaldehyde from indoor spaces. Using air purifiers with HEPA filters can help to capture and remove formaldehyde particles from the air. Choosing formaldehyde-free furniture and products reduces the source of formaldehyde emissions in the home. Keeping indoor plants can also help to improve indoor air quality by absorbing formaldehyde.