Examples range from contamination of the food or water supply, to high levels of air or noise pollution, a chemical accident, a disease outbreak or a natural disaster.
这方面例子的范围包括从食物或水供应的污染，到空气或噪音高度污染、化学事故、疾病暴发或自然灾害。
2
And smokeless products contain the same chemical compounds, including nicotine, that have been linked to heart disease in cigarettes.
无烟烟草制品和普通的烟一样同，有包括尼古丁这类的和心脏疾病有关的化学成分。
3
Therapeutic solutions that target the behavioral, chemical, and genetic components of the disease are all in development.