Consider replacing your current bathroom and kitchen faucet aerators with low-flow...

It's that dirty brown haze that hangs over a city on a hot summer day, reminding us that we probably should get away for a bit and breathe some country air. The word originated from a contraction of smoke and fog, but the ugly stuff consists mostly of ground-level ozone, which is formed when oxides of nitrogen (NOx) mix with volatile organic compounds (VOCs) in the air. Heavy motor-vehicle traffic, industrial emissions, and the use of chemical solvents release the offending substances into the air; hot, sunny weather facilitates the chemical reaction that creates ozone. Smog can lead to lung irritation, asthma, emphysema, and other health problems. For more on smog, click here.

Bringing your lunch to work or school is environmentally friendly; you're saving money by not...