As traditional candles burn, they can contribute to indoor air pollution by emitting volatile compounds and smoke, which may pose inhalation risks. Scented wax melts are often marketed as safer alternatives to candles because they’re flame- and smoke-free. But in a study in ACS’ Environmental Science & Technology Letters, researchers describe how aroma compounds released from the melted wax can react with ozone in indoor air to form potentially toxic particles.

Agricultural fertilizers are critical for feeding the world’s population, restoring soil fertility and sustaining crops. Excessive and inefficient use of those resources can present an environmental threat, contaminating waterways and generating greenhouse gases such as nitrous oxide. Now, researchers reporting in ACS Agricultural Science & Technology have addressed those challenges with glass fertilizer beads. The beads control nutrient release, and the researchers say they’re environmentally compatible.

Have you ever wondered what a mummy smells like? According to research reported in the Journal of the American Chemical Society, it’s “woody,” “spicy,” and even “sweet.” Researchers analyzed the volatile compounds emitted from nine mummies spanning nearly 2000 years of Egyptian history and found that the scents still lingering today could tell us how the bodies were preserved — or how the person once lived — thousands of years ago.

Electronic textiles, such as heating pads and electric blankets, can keep the wearer warm and help ease aches and pains. However, prolonged use of these devices could cause heat-related illnesses, including hyperthermia or burns. Recently, a group of researchers designed and tested a “smart” jacket equipped with environmental sensors, heat-generating and color-changing yarns, and artificial intelligence (AI) to control temperature and prevent overheating. Their results are published in ACS Applied Materials & Interfaces.