|The student probably used a spell
check but there are two small spelling errors in this section. Did
you find them? Why didn't the spell check find them?
Green house effect is one of the phenomena caused by
industrial pollution. From the data taken by scientists, our earth
has been warming up since the Industrial Revolution. Why does it
happen? The factories' emissions have created smog on the atmosphere.
The earth's atmosphere becomes like a green house, and the earth
and everything inside of it have become like the plants in the green
house. The sunlight can pass trough the ozone layer but the heat
transferred by the sunlight can not escape easily from the layer
of smog and is deflected to earth's surface again.