Menthol is a chemical naturally found in peppermint and other mint plants, but it can also be made in a lab. First added to tobacco in the 1920s and 1930s, menthol reduces the harshness of cigarette ...
Outdoor air pollution is unhealthy for everyone, but some groups of people are more vulnerable than others. Taken all together, these groups make up a large portion of the population. Children face ...