Chemist Sources

http://www.ace.mmu.ac.uk/kids/acidrain.html
http://wow.osu.edu/experiments/chemistry/pH.html

Health Scientist Sources

http://www.ns.ec.gc.ca/msc/as/as_acid.html

Biologist Sources

http://www.an018.k12.sd.us

Economist Sources

http://allisonscienceproj.tripod.com