1) BACKGROUND of the chemical (uses of this chemical, occurrence [natural or man-made], safe vs danger-level exposure concentrations, acute or chronic toxicity, etc)
2) Does this chemical bioaccumulate? if so, why? If not, why not? Also discuss biotransformation of the chemical here...does your toxin undergo biotransformation?
3) Effects on local wildlife, with a specific documented example of harmful exposure with this toxin. Document how clean-up would occur (if it could) and where storage of the toxin would happen...for how long...then what would be done with it?
Conclude with numerical figures on yearly generation of this substance (what amount is made or generated whether naturally or by man-made process), and how is disposed of yearly.
Pick an environmental toxin that is not too simple or common as this would limit your ability to answer the questions above.