Need to make a report on environmental problems.?

I need a report(15 pages) on environmental problems like ozone depletion, water pollution,smog,etc stuff(one broad topic). I don't seem to find any good high school level material. Please suggest me some good reference web sites.Where can i find good report material?|||first don't ever use wiki, u know they take points off for using that source..then again i dont know where u reside and what school u go to! we cant use wiki even as a reference ... these r some sites i found, i thought they were good:


http://library.thinkquest.org/26026/Envi鈥?/a>





http://www.lenntech.com/environmental-pr鈥?/a>





http://www.buzzle.com/articles/lists-of-鈥?/a>





http://www.seafriends.org.nz/issues/thre鈥?/a>





http://www.uga.edu/srel/ecoviews/ecoview鈥?/a>





the first one is real nice, make sure u check go through all the links in the first one!