Plastic Bags Controlled Assessment

Only available on StudyMode
  • Download(s) : 225
  • Published : February 4, 2013
Open Document
Text Preview
Plastic is also a common name for polymers. They are made of long strings of carbon and other elements. Each unit in a string is called monomer and is a chemical, usually derived from oil. Plastic is used because they are good insulators of heat or electricity. Metals and plastics eventually can be broken down by weathering processes, but ordinarily soil microbes have little or nothing to do with their decomposition process. The cycling of decomposer of plastic is dependent on soil-dwelling decomposer organisms, including earthworms, snails, millipedes, and insects that will eat the plastic down into little pieces. These microbes are vital to the breakdown of dead and discarded organic materials, they help the process, go a little faster. The plastic is especially designed for soil. Some materials can last a long period of time because the chemicals bolds in order to hold the molecules together are sometimes often stronger than the nature’s power to take them apart. This also depends on the type of plastic. It also depends on the type of the environment to which it is exposed in. Plastic starts to decompose within a year. Some people say that it takes 500 years to decompose because of the microorganisms behind it.

the environmental impacts of supermarket bags are dominated by the energy and raw materials needed to manufacture them. Plastic bags are inexpensive because relatively small amounts of energy and raw materials are needed to make them. These same attributes that make plastic * bags affordable and light also make them easier on the environment than alternatives like paper bags and reusable cotton totes. * Critics of plastic bags frequently argue that they “take hundreds of years to decompose,” Second, even organic materials in landfills commonly take hundreds of years to decompose. Decomposition is the chemical breakdown of organic matter into its constituents by the action of the bacteria. There are seven types of plastics. Some researchers said...
tracking img