An air cleaner can help remove indoor pollutants and reduce the spread of pathogens such as the coronavirus. The Post’s Lena Sun demonstrates how to make one. (Video: Joy Sung, Lena Sun, Jayne ...

Running your furnace, central air, or heat pump probably constitutes a big part of your utility bill. But it’s a small, often inexpensive part—the air filter—that keeps these heating and cooling ...

If you drive a car with an internal combustion engine — basically any modern vehicle that isn't electric — it requires a combination of oxygen and fuel to run. The fuel comes in the form of gasoline ...

New York, and other major cities on the eastern seaboard are currently blanketed in smoke from a massive outbreak of wildfires in Canada. Air quality levels are reaching their worst ever recorded ...