Next time you make yourself a hot cup of tea or coffee, you might want to let it cool down a bit before drinking. Researchers say letting your hot drinks cool off could help you avoid some kinds of cancer. In fact, the United Nations’ cancer research agency decided to list hot drinks with lead, gasoline and exhaust fumes as "possibly carcinogenic." In other words, each one could cause cancer. The International Agency for Research on Cancer (IARC) is part of the World Health Organization (WHO). The IARC published the findings in the medical journal Lancet Oncology. Researchers at IARC found evidence that drinks at temperatures above 65 degrees Celsius, when swallowed, can cause cancer of the esophagus. The researchers examined findings from other studies where tea and coffee were often served at 70 degrees Celsius or above. Those studies were completed in Iran, China and South America. In developed countries, health experts have linked esophageal cancer to smoking and alcoholic drinks.