we recently conducted a group research project on air pollution. my contribution was the introduction. which gases are harmful and a latter of the effects of the gases. the assignment was very informative about aspects which are effecting the earth we live on. we did learn alot. i worked together with Pearl and Sanele.i also contributed a table of information about the effects and how the air pollution level has increased from 1997 to 2007.  i also contributed images showing the respiratory system of a person. this is the URL to our complete assignment