Key points from article :
Makers of commercial cleaners are adding chemicals to make them smell nice—pine scents, for example, are quite common.
Many chemicals in commercial cleaners that smell better may contain monoterpenes.
High levels of monoterpenes interact with natural ozone in the air.
Resulted in producing high levels of secondary organic aerosols (SOAs).
SOAs are types of aerosols that are known to irritate the lungs when inhaled.
Levels in room mopped with a commercial floor cleaner were similar to those a person sitting next to a busy road would experience.
In some cases, levels were similar to sitting next to a road for up to six hours.
More work is needed to find out if the SOAs in cleaning agents are doing more than irritating the lungs of people who use them.
Study by Indiana University, led by Philip Stevens, published in Science Advances.