In this example, someone has just asked me to help them find an idea for an assignment--or they have just graduated from college and are trying to identify their career plans and goals. The mention of "environmental studies" is the key.
My first response to this individual: "Let's use the 4 Elements as guiding points to help you identify where your interests are, and which one best suits your answer." After that is established, I then take each element and its nature, then apply a range of ideas that may be suitable. For example:
Air: (Air) pollution - management of hazardous waste gases; quality of air control in residential or commercial locations
Water: Potable water supply and management; ocean pollution and recovery; oil & natural gas spillage-recovery
Fire: Recycling garbage for fuels
Earth: Alternative fuel sources; landfill management and soil reclamation; ecosystem preservation and recovery; animal and wilderness preservation
Do you have a subject or topic you'd like to see mixed-and-matched with the 4 Elements? Try Fluid Learning techniques and methods--or if you're in need of something different, write and ask me!