People in all parts of the world are observing "No Tobacco Day". It is the day （11） the World Health Organization (WHO) appeals to people to stop using tobacco products. WHO hopes if people stop smoking cigarettes or （12） tobacco for one day, they will stop permanently. Health experts have warned for years that smoking can lead to heart disease, cancer and other （13） .WHO says diseases linked to smoking kill （14） 2,500,000 persons each year. Still, many people find it （15） stopping smoking. One reason is nicotine, a substance found in cigarettes. Nicotine is a drug.
　　Its effects are （16） those of cocaine and heroin. "No Tobacco Day" is intended for smokers and （17） who earn money from tobacco sales. So businesses are urged to stop selling tobacco products for twenty-four hours. （18） are urged not to carry advertisements for cigarettes.
　　WHO has approved plans to help reach its （19） of a "smoke-free" world. They urge governments to take action to help （20） make money by growing other crops. They also call for improved public information campaigns about the risks of smoking.