Ppaer on using algae to measure pollution

[Tom Barr]

I did some under graduate work on marine and Freshwater species to determine pollution levels. such methods are used by the EPA to determine whether a stream is polluted or not.

Google Image Result for http://wy.water.usgs.gov/YELL/nwqmc/images/fig5.jpg

You may find this interesting.

Regards,
Tom Barr