1, spit. After a series of coughs, people have long been used to hearing the sound of sputum falling on the ground, which is a social phenomenon. Niu Wenyi, deputy director of the Department of Social Medicine and Health Education of Peking University College of Public Health, said that sputum is the transmission route of many respiratory infectious diseases, including bacteria and viruses. Spitting everywhere, when the sputum is dry, thousands of microorganisms will float into the air and become the chief culprit in the spread of diseases such as influenza, measles, meningitis and tuberculosis.
2. Littering. Nowadays, when we go to transportation hubs, tourist attractions and other crowded places, we often see peel scraps everywhere. According to the data of Sino-German Environmental Geological Engineering Forum, China has become the country with the heaviest garbage burden in the world, and the existing domestic garbage exceeds 6 billion tons.
That rubbish is like a time bomb, threatening people's health. Lu, a professor at the School of Environment of Renmin University of China, pointed out that littering will provide a "foothold" for pathogenic factors.
There is another meaning of littering, that is, garbage can't be classified correctly. If garbage is not classified and burned, the toxic and harmful gases produced may be teratogenic and carcinogenic. Therefore, experts suggest that garbage should be classified well, and the method is simple: put food waste such as peel and vegetable residue together; Plastic bottles, cans and other recyclable bottles and cans are put together; Harmful waste separated the batteries, lamps and glass fragments and threw them into the designated dustbin.
4. Smoking in public places. Smoking does great harm to yourself and others. On the one hand, smoke contains toxic and harmful substances such as nicotine and tar, and smokers are prone to lung cancer, coronary heart disease, bronchitis, emphysema and other diseases. It was found that the life expectancy would be reduced by 1 1 min for every cigarette smoked.
5. It's loud. Speaking loudly seems to have become an "instinct" for people living in noisy cities. As we all know, loud noise will pose a threat to health. After research, the American Speech Listening Association clearly pointed out the harm of high decibel noise to human body. Studies have shown that long-term exposure to 50 decibels of noise can easily lead to cardiovascular diseases; Up to 70 decibels, the incidence of myocardial infarction will increase significantly by 30%; If it exceeds 1 10 dB, it may cause hearing loss.
6. Don't flush the toilet after defecation. In the impression of many people, the public toilet is a stinking place with nowhere to waste.
People often hold their breath and barely finish it. Because the flush button is dirty, they turn around and leave, making the public toilet stink. Dirty environment will make bacteria and viruses flood, mosquitoes and flies swarm, and increase people's risk of infectious diseases. Therefore, for the sake of public health, you must flush in time after defecation.
7. Eat on the bus. The fast-paced city life makes people have to eat on the way to work. There is a lot of people on the bus, and the air circulation is not smooth, which is easy to breed bacteria. Take bus handrails as an example, there are 380 colonies per 10 square centimeter, including pathogenic bacteria such as Escherichia coli and Salmonella. It can be seen that eating in this environment is undoubtedly "eating germs."
In addition, when the car is driving at high speed, it often encounters bumps and sudden braking, and it is very easy to choke when eating, which also affects digestion.