Madurai: The city has to cope with not just unbearably high temperatures, it now has to to deal with soaring carbon dioxide levels in the atmosphere as well.

In what could be an alarming fallout of air pollution, top cancer doctors say they have noted a significant rise in lung cancer among non-smokers in recent years.

Cancers may have caused some 2.8 million deaths in China in 2015, which means more than 7,500 people die of cancer every day, according to a study by Chinese scholars

With increasing incidence and mortality, cancer is the leading cause of death in China and is a major public health problem.Because of China’s massive population (1.37 billion), previous national incidence and mortality estimates have been limited tosmall samples of the populat ion using data from the 1990s or based on a specific year.

Air pollution is responsible for 10,000 to 30,000 deaths annually in Delhi as it is the fifth leading cause of death in India, a report by India's Centre for Science and Environment (CSE) said.

Black patients have higher lung cancer risk despite lower pack years of smoking. The researchers assessed lung cancer risk by race, ethnicity, and sex among a nationally representative population eligible for lung cancer screening based on Medicare criteria.

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Smoking seen as one of the biggest risk factors for the disease

Diesel exhaust is a known lung carcinogen. Farmers use a variety of dieselized equipment and thus may be at increased risk of lung cancer, but farm exposures such as endotoxins may also be protective for lung cancer. The researchers evaluated the relative risk of incident lung cancer, including histological subtype, from enrollment (1993-1997) to 2010-2011 in relation to farm equipment use in the Agricultural Health Study (AHS), a prospective cohort study of pesticide applicators and spouses in Iowa and North Carolina, USA.

Small cell lung cancer (SCLC) comprises approximately 15–18% of all lung cancers worldwide. SCLC is the most aggressive subtype of lung cancer and is characterized by rapid doubling time, high growth fraction, and early widespread metastasis. Despite high response rates to initial treatment, SCLC usually relapses and becomes refractory to treatment within one year. The median survival is 14–20 months for limited SCLC and 9–11 months for extensive SCLC. These statistics highlight the need for new tools to aid in diagnosis and prevention.

More than 3 million people die prematurely each year from outdoor pollution and without action deaths will double by 2050

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