# CFCs and Ozone Depletion

\$12.00

This is for a chem class called our chemical environment. the research paper needs to be on this topic and show to be a worth while paper in how the environment is effected.
Sources were sufficient, current, and reflected improvements advised after
submission of annotated bibliography.
15
The paper reflected improvements over the rough draft submitted for peer
review and, where appropriate, took advantage of suggestions made by the
reviewer.
15
The mechanics of the paper were acceptable for polished college level
writing.
15
The relevance/importance of the topic to the environment is clearly
presented.
30
The various views and opinions regarding the question are outlined.
30
Scientific support, or its absence, for most common views/opinions is
thoroughly discussed.
30
Relevant scientific background information is provided and clearly
explained.
30
Conclusions are drawn and supported by the scientific/technical literature.
30

## Description

Climate change is the most important concern for the world in the 21st century. Since the second half of the twentieth century, the world has experienced a number of changes that can be attributed to climate change. Climate change results from increase global warming which is attributed to increases emission of green house gases that destroys the ozone layer.  Depletion of ozone layer can be described as two distinct but closely related observations. First, there is slow but steady decline in the total volume of the ozone layer found on the earths stratosphere which has been observed since 1970s.  It is recorded that the ozone layer has decreased by 4 percent for every decade. Second, there is larger but seasonal decrease in the stratospheric ozone covering the earth’s Polar Regions which has happened during the same time period (Benedick, 1991).  The latter is regarded as ozone hole that plays important role in regulation of the world’s temperature. In addition to these two common phenomena, recent studies shows that ozone depletion is complemented by troposphere ozone depletion events which mostly takes place in the polar region surface in spring.