Quote, Paraphrase, and Citation #1

Secondhand smoke is incredibly damaging to your health.  When forced to breathe in the toxins from the smoke, you are injuring your body with every breath.  Even low levels of secondhand smoke in the air are still dangerous.  When being subjected to the smoke you are inevitably giving yourself various life-threatening diseases and cancers. 

"Secondhand smoke is associated  with disease and premature death in nonsmoking adults and children.  Exposure to secondhand smoke irriates the airways and has immediate harmful effects on a person's heart and blood vessels.  It make increase the risk of heart disease by an estimated 25 to 30 percent.  In the United States, secondhand smoke is thought to cause about 46,000 heart disease deaths each year.  There may also be a link between exposure to secondhand smoke and the risk of stroke and hardening of the arteries; however, additional research is needed to confirm this link." - The National Cancer Institute

Secondhand smoke is incredibly detrimental to your health.  It does more damage to your body than people may think.  Not only does secondhand smoking enhance the risk of heart disease, stroke, and damaging your arteries, but it also can be fatal and life threatening.  According to the National Cancer Institute, in the United States 46,000 heart disease patient's lives are taken yearly.  All of these diseases are suspected to be linked to secondhand smoking; however, after extensive studies and tests have been performed, it can be a proven fact.

Source:

Secondhand Smoke and Cancer - National Cancer Institute." National Cancer Institute -   
Comprehensive Cancer Information. National Cancer Institute, 29 Oct. 2010. Web. 03 Nov. 2010. <http://www.cancer.gov/cancertopics/factsheet/Tobacco/ETS>.