I have completed your homework. Please travel to the nearest airport and fly to Charlotte, NC. Call the "Hickory Hop" and ask to be transported to Boone. When you arrive, send me an email and I'll let you know where to leave the $1,000,000. ...

... When the cash has been deposited in my bank account, I'll email you the homework file.

From the inbox:

I study Development Economics in one university in [country], with many subjects in the university, Environmental Economics is one of my difficult subject. I have many problem that I can not solve by myself, so I need your help.
 
I find it very difficult to find solution and I completely don't know how to fill the table of the abatement emission of a firm. Could you feel free to do this for me and explain me how to do that. Please find this exercise in my attach file.

My reply:

Sorry, I can't do your homework for you.