If you want to live longer, you might as well follow the advice of numerous universities and experts in Europe and America. This advice includes: raising a kitten, staying calm in the face of change, maintaining a positive mindset, stopping eating junk food, losing weight, avoiding living near a highway, attending school, making more friends, and finding a pleasant marriage.
This advice used to be nothing more than commonplaces, but experts can now calculate more precisely that people who follow all this advice will live 30 years longer than those who do not.
Among these, McMaster University in Canada calculated that living near a highway reduces life expectancy by two and a half years, which is closely related to long-term illnesses caused by inhaling exhaust fumes; Ohio University in the United States pointed out that people who are under long-term stress will have their life expectancy shortened by three to four years; those who have not finished high school will have a life span that is 9.3 years shorter; Yale University found that older people with a positive mindset will live an additional 7.5 years; if having a cheerful personality is associated with those who make many friends, they will generally live 9 years longer; if you feel lonely, owning a cat or a goldfish can add several months to your life; and if you can have a pleasant marriage, people can live an additional 5 years.