Biosystems Tree Hocker. Salary: $30,000 or less 

You dropped $200,000 on your biosystems major, but earned more Cs than Cookie Monster gets through in an hour. Now you're working in a plant nursery, "engineering" eco-friendly Christmas tree sales to passing families.

Corn Flake Engineer. Salary: $40,000 

You just scored a prestigious internship with Kellogg's Cereal. Well, that takes care of your post-graduation plans...not to mention breakfast for the next two years.

Biosystems Engineer. Salary: $60,000 

After six years in grain production systems, you know everything about grain. You know things the people who invented grain farming don't know about grain. Things most contemporary grain experts don't know about grain. Things grain doesn't know about grain. You need a grain—er, we mean, "break." You have been hearing good things about hydroelectric power...

Head of Biofuels. Salary: $68,000 

Your new job as head of biofuels for the State Department comes with a chicken-and-the-(cage-free)-egg problem. You currently drive a gas-guzzling SUV that'll get you sneered right out of the office, but you can't afford to upgrade to a Prius until you get a few paychecks in the bank. Looks like it's the bus for now.

Head of Green Engineering. Salary $75,000 

The U.S. is about to sign a new environmental treaty—looks like those conferences aren't just for show after all. Shouldn't be long now until the New York Times comes knocking on your door to get your analysis.