What major and/or minor would one take if they are interested in alternative energy?

Answer 1

I would suggest environmental engineering. Many universities have that as an option. Environmental science is also a good undergrad major if you want to start there and get an advanced degree in engineering. Those are good choices primarily because they are interdisciplinary. That way you learn many different sciences and how they integrate.
If engineering isn't for you don't worry. You can still get degrees in stuff like environmental science and work with alternative energy in some capacity. Engineering would give you the most hands-on stuff and probably the best paycheck later on though.

Answer 2

Creating alternative energy sources? or wanting to encourage alternative energy sources?

To create alternative energy sources I would choose engineering, physics, or chemistry or others in that field or area.

To encourage the use of alternative energy sources I would choose political science (to lobby), range and wildlife (for ecological reasons), biology, or renewable natural resources.

Answer 3

Become a chemical engineer. Someone is going to have to build all these alcohol factories and manufacture special materials for windmill blades and try and run anerobic digestors more like stable chemical processes.

Answer 4

any one of the sciences although physics or chemistry would be the best options in that case. If you are really interested there are course in irish universities dedicated to it. Theres one called Envoirmental Science in University of Limerick