In the experiment which college students breathed air with increased amount of carbon dioxide through a mask, the students found it much more stressful if they. were surprised by the trials that contained the increased amount of carbon dioxide.
life style disease. Bart has a very unhealthy lifestyle, which is marked by the presence of a number of. behavioral risk factors. Although it may become the leading cause in the near future, which factor currently ranks SECOND as a cause of preventable deaths in the US.