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9. CFCs<br />
10. Plastic Grocery Bags<br />
Short for chlorofluorocarbons, CFCs are nasty chemical compounds that wreak havoc on the<br />
environment. Used in refrigeration units and aerosol cans, CFCs combine with atmospheric ozone,<br />
neutralizing the molecular compound and weakening the ozone layer, an important environmental<br />
barrier that protects the earth's surface from ultraviolet radiation from the sun. While increased<br />
regulation since the 1970s has diminished their use, CFCs can endure in the atmosphere for nearly<br />
a century, making this a very long-lived mistake.<br />
According to their Material Safety Data Sheets, CFCs and HCFCs are colourless, volatile, relatively<br />
non-toxic liquids and gases with a faintly sweet ethereal odour. Overexposure may cause dizziness,<br />
loss of concentration, Central Nervous System depression and/or cardiac arrhythmia. Vapors<br />
displace air and can cause asphyxiation in confined spaces. Although non-flammable, their<br />
combustion products include hydrofluoric acid, phosgene, and related species.<br />
Touted as a convenient and cheap alternative to paper bags, plastic grocery bags gained acceptance<br />
in the late 1970s and now meet 80% of retailers' bagging needs. They've saved millions of trees<br />
but come with equally bad consequences: more than 500 million are used and discarded each year,<br />
millions of which never make it to a landfill and fall as litter. And depending on the plastic used in<br />
production, those bags may take several hundred years to decompose. The solution? Recycle, or<br />
better yet, skip both paper and plastic and bring a reusable bag of your own.<br />
11. Cigarettes<br />
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