Carbon monoxide is a colorless, odorless gas produced when fuels burn incompletely. It can cause serious illness or death before you realize it’s there. Here’s where it comes from, how detectors work, and the practical steps that prevent poisoning.

Lead-based paint is still common in homes built before 1978. The real hazard is usually the dust and chips that form when the paint deteriorates or gets disturbed. Here’s where it shows up and how to reduce the risk, especially for young children.

Asbestos is a group of fibrous minerals once common in building materials. The fibers can cause serious lung disease when inhaled, but intact materials usually aren’t a problem until they’re disturbed. Here’s where it shows up and how to handle it safely.