15+Principle+2+ChanteSalmon


 * What is the second principle in green chemistry? **

Principle 2 tells us to use chemicals that have less environmental impact. This principle is mainly geared towards factories and industries, but can be for consumers as well. This principle is telling us to be cautious of the chemicals we are using and putting in our homes and in the environment. Therefore a smart and effective way to reduce chemical impact is buying and using chemicals with less of an impact. For example, replacing CFC's with CO2's to make a safe and environmental product.

** What are CFC's? ** CFC, Chlorofluorocarbon, is a compound made of Chlorine, Fluorine, and Carbon.CFC's were developed to be safe, non toxic and non-flammable in 1928 by Thomas Midgley. CFC's were found in many products after World War II. CFC is used in refrigerants, agents, propellants and solvents. It was most commonly used to expand foam to make plastic foam cups. CFC's play a big role in the destruction of the ozone layer making this chemical harmful to everyone. The radicals, from the chlorine, destroy the ozone, therefore having a big impact on the environment. They found out that CFC's were destroying our ozone in the 1970s and it was officially banned in 1989.

** What is CO2's? **

CO2, Carbon dioxide, is made of carbon and oxygen. Carbon dioxide was first discovered in the 17th century. However, it wasn’t liquefied until 1823. CO2 is used by many industries such as, food and chemical industries. It is most often seen in air guns and in pop or carbonated water. Because carbon dioxide is a greenhouse gas it creates an effect in the environment which means it adds to global warming. Not only does it have and impact on the environment but too much exposure to CO2 can cause serious effects to the human body like head trauma and tremors.


 * Why is CO2 better than CFC's? **

Although CO2's produce greenhouse gases, being responsible for 50% of global warming, it is still more environmental than CFC's, is responsible for 22% of global warming. Not only do CFC's destroy the ozone layer, it also plays a part in global warming. For example, CFC's collect more heat than carbon dioxides; at least 10, 000 times more effective. Since it has more heat it lives longer in the atmosphere, up to 110 years. Carbon dioxide, on the other hand, only lives for a few years in the atmosphere. CO2 can also be removed from the atmosphere by planting more trees, flowers, and plants. This would reduce the amount of carbon dioxide in the atmosphere, but unlike CO2's Chlorofluorocarbons can not be removed from the atmosphere. This is probably why they chose to replace CFC's with carbon dioxide in plastic foam cups in the 1990s.

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__ Bibliography __ __ [|www.en.wikipedia.org/wiki/CFCs] __ __ [|www.en.wikipedia.org/wiki/CO2] __ __ [|www.chemguide.co.uk/organicprops/haloalkanes/uses.html] __ __ [|www.theozonehole.com/cfc.htm] __

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**Three things I've learnt: ** 1. Principle 1 (Zainab Patel) 2. Rehabilitating Lakes (Alexander Chiu) 3. Metallury (Keasha Grant)
 * The global annual production of plastics is about 100 million tons
 * Benzene is a carcinogen
 * 8% of the total production of oil is consumed for the plastic industry
 * Limestone helps reverse the effects of acid rain on the water of the lake by neutralizing the acid
 * Planes have limestone and can help neutralize lakes
 * Ph levels are rising in the lakes
 * Metallury is the study of the chemical and physical properties of a metal
 * Physical process concentrates the ore by separating while the chemical process concentrates the ore but converts into pure metal
 * This process creates acid rain, fossil fuels, and air pollution