Explain the reason why studies of the health effects of smoking among individuals who smoke would not be a concern of environmental epidemiology. Why is exposure to secondhand cigarette smoke a concern of this discipline?

In some cultures , smoking is also carried out as a part of various rituals , where participants use it to help induce trance - like states that they believe, can lead the to spiritual enlightenment.

a problem could be dealing witj emotional stress..all of these factors contribute to emotional stress.

all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.