If I were 22 and starting out.... 8 Sectors where Doing Well is also Doing Good

This developing human planet, with it's enormous population growth, offers so much opportunity for success.  

If you're starting out, or restarting, enter into any one of these industries. Then with no problems or pride, do every job, learn as much as you can, meet as many people as you can.   Stick around long enough to see macro trends and know the players, keep growing your knowledge base, insert yourself everywhere, keep meeting people.   Remember their names.  Pay close attention.  Find mentors and be a friend to those coming up behind you.   Thus, your "success" unfolds, while creating success for others.

What industries need your mind, heart and hands?

1. Food & Water – opportunities everywhere.... efficiency and yield of food production…. Localization, waste reduction....reduction in water waste- food storage... desalinization tech... food and water law 
2. Recycling, Garbage, Wastewater- Hundreds of billions in new business in every developing nation on earth.  
3. Power Generation, Storage, Optimization
4. Communication - Wireless, Data Infrastructure around the earth
5. Data-  Storage, Protection, Retrieval, Transfer
6. Underserved health populations - Self Health/Personalized Medicine
7. Transportation
8. Migration and Displacement Support services (from Climate and Man Made issues)- to include education, housing, banking, culture, transit, temp housing.

You can do stuff that matters and be tremendously successful in the process.

Just, pretty please, don't go to work making apps that will help your dog get a hotel room.  Keep your eye on the prize, value depth, and know the value of connection.