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"Those are significant differences, especially at the higher temperature," Carbonell said. "A lot of people fry at the higher temperature, especially when they stir fry. What's important about this research is that we're not talking about toxins being absorbed into the body by ingestion but by breathing them. So they can be harmful to the person who is cooking and others nearby. "
Although the researchers used deep-frying techniques to test the oil, Sidhu --a senior research scientist in UDRI's energy and environmental engineering division --said the emissions are just as harmful when using lesser amounts of oil, such as when cooking in a wok. In fact, the UDRI study was prompted by other studies released in the last decade that indicate the air in homes in China is often significantly more polluted than the air outside. Those studies also attribute toxins from burning coal and cooking oil to greatly increased rates of lung cancer in women in some areas of China.
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