Links for pollution block b

http://www.epa.gov/air/oarfaq.html

//images.google.com/imgres?imgurl=http://www.maineenvironment.org/air/wymanPPT-1.gif&imgrefurl=http://www.maineenvironment.org/air/wyman072700c.htm&h=438&w=612&sz=13&tbnid=7uEuIRJyLawJ:&tbnh=95&tbnw=132&start=1&prev=/images%3Fq%3Dpollution%2Bgraphs%26hl%3Den%26lr%3D%26ie%3DUTF-8

http://www.nrdc.org/water/oceans/qttw.asp#what

http://www.irishstatutebook.ie/ZZA1Y1977S1.html

http://www.nrdc.org/water/pollution/storm/chap1.asp#table1-1