During the Spring Festival this year, the weather in our province was extremely cold. It is reported that six residents of a town in our province closed their doors and windows in the cold night and s

During the Spring Festival this year, the weather in our province was extremely cold. It is reported that six residents of a town in our province closed their doors and windows in the cold night and squeezed into their rooms to keep warm with coal stoves. Solutions; (1) carbon monoxide is easy to combine with hemoglobin, which makes people unable to combine with oxygen well, and makes people suffer from hypoxia and poisoning;

(2) Due to the closed doors and windows, the oxygen in the air is decreasing, and coal generates carbon monoxide under the condition of insufficient oxygen, which leads to poisoning.

So, the answer is: (1) carbon monoxide; (2) Incomplete combustion of coal.