China ranks first in the world in terms of new cancer cases and deaths, and the latest edition of the World Cancer Report shows that developing countries in Africa, Asia and Central and South America have the most serious cancer incidence situation. 14 million new cancer cases and 8.2 million deaths were recorded worldwide in 2012. Among them, China added 3.07 million new cancer cases and caused about 2.2 million deaths, accounting for 21.9 percent and 26.8 percent of the global total, respectively. The WHO figures are slightly lower than China’s own statistics. Data released by the National Tumor Registry for 2012 show that China has about 3.5 million new cancer cases each year, resulting in about 2.5 million deaths. However, China was not among the countries with the highest cancer rates in 2012, with the top 5 countries being Denmark, France, Australia, Belgium and Norway. China is also not the country with the highest cancer mortality rate, according to statistics, the top ranked countries are Mongolia, Hungary, Armenia, Serbia and Uruguay. Lung cancer remains the most prevalent and deadly cancer, with approximately 1.8 million new cases and 1.59 million deaths in 2012. China accounted for more than one-third of such cases. Experts say that smoking, long-term exposure to air pollution and occupational exposure to carcinogens are the main factors that increase the risk of developing lung cancer (in China). Among other types of cancer, China accounts for about half of all new liver cancer and esophageal cancer cases and 49 percent of deaths worldwide, and it also accounted for more than 40 percent of all new stomach cancer cases and related deaths in 2012.