My mother was standing on the front porch, shivering in the cold, smoking one of her filtered cigarettes
Long-term exposure can also cause damage to the liver, kidneys, and central nervous system
Parents education measured adolescents SES, subjective family economic status, and academic performance
Centers for Disease Control and Prevention (CDC), said there is no safe level of exposure to second hand smoke, and that people with cardiovascular disease could risk heart attack with less than an hours exposure to environmental tobacco smoke, which restricts blood vessels and increases clotting
However, evidence from developed countries on hardening is inconclusive since very few studies have reported that hardening was occurring, [6,7,8] while recent studies have reported that hardening was not occurring [9,10,11]
Even a temporary lack of sleep can cause trouble with memory, reaction time and coordination