In many areas of China, it is usually necessary to burn coal for heating and cooking. However, burning coal will produce tiny particles and gases of various harmful chemicals, such as benzene, carbon monoxide, formaldehyde and polycyclic aromatic hydrocarbons. The relevant working group of the International Agency for Research on Cancer under the World Health Organization has published a special research report, and indoor air pollution caused by coal burning has been confirmed to be carcinogenic.

China Indoor Environment Committee believes that winter is the high incidence period of all kinds of indoor pollution, and the problem of kitchen fume pollution will be aggravated due to inconvenient ventilation in winter. At the same time, coal stove pollution and carbon monoxide poisoning caused by coal-fired heating in urban and rural areas are also serious. Indoor pollution caused by heating in winter and domestic fuel pollution in some areas makes the content of harmful gases 7 to 511 times higher than the allowable limit concentration.

coal is a highly variable fuel, ranging from anthracite with high calorific value to various forms of bituminous coal, and then to the intermediates (lignite and peat) formed by coal. Each of these types of fuels can contain different contents of water, nonflammable inorganic materials (dust), sulfur, and sometimes a lot of other impurities, such as arsenic, fluorine, lead and mercury.

According to some studies, there is a positive correlation between coal use and lung cancer exposure. In 1993, according to the amount of black smoke coal used every year in Xuanwei, China, the relationship between significant coal exposure and lung cancer was reported. The time spent cooking with coal is positively correlated with the risk of lung cancer in women. In Gansu, it is also found that people who use coal as the main fuel have a higher risk of lung cancer, and the exposure-response relationship between men is significant.

1 rich and varied diet, rich nutrition, such as meat porridge, fish porridge, egg porridge, glutinous rice porridge porridge, lily porridge, etc., mainly porridge, with fruits and fresh vegetables.

2. Help patients who can't take care of themselves turn over regularly, scrub and massage their hands and feet every day.

3. For patients with pain, we should try our best to meet their analgesic requirements. Don't be afraid of addiction to narcotic analgesics to improve their quality of life.

4. Give patients more spiritual comfort, eliminate their fear of death, encourage their spouses and relatives, give patients a love, and express their love for patients through communication, so that patients can relax as much as possible.

5. closely observe the patient's breathing, blood pressure, pulse, body temperature and consciousness changes. If there is any abnormality, report it to the doctor immediately and treat the disease.