The high-efficiency cabin air, or HECA, system could help protect the 25 million American children who commute on school buses nearly every day. Children are more susceptible to air pollution than adults because they breathe more quickly and their immune and cardiovascular systems are still developing, said Yifang Zhu, the study’s senior author and an associate professor in the department of environmental health sciences.
Pollution reduction was even greater under freeway driving conditions, which was surprising because freeways have particularly high pollutant concentrations due to traffic congestion and increased emissions. The study found that the air inside buses with the HECA system was as clean as air near the beach in Santa Monica, California. The study appears today in the early online edition of the peer-reviewed journal Environmental Science and Technology. Read the full article at Science Daily.