求翻译：烟中的有害物质 吸烟危害健康已是众所周知的事实。吸香烟是导致慢性支气管炎和肺气肿的主要原因，也增加了得肺炎及心脏病的危险，并且吸烟也增加了高血压的危险。吸烟造成的社会危害也不可小视，因吸烟点火乱扔未熄灭的烟头，造成火灾的案例屡见报端。所以我们的健康及社会的安全请改掉吸烟的坏习惯！是什么意思？

Harmful substances in cigarette smoking is hazardous to health is well known fact. Cigarette smoke is a major cause of chronic bronchitis and emphysema, also increase the risk of overwhelming pneumonia and heart disease, and smoking also increases the risk of hypertension. Smoking cause harm nor smaller view of society, due to cigarette smoking ignition throw did not go off, causing fire case often found in newspapers. Health and social security so we get rid of bad habits of smoking!