I am a high school senior debating between these two majors. In high school, I enjoyed both Mechanics and E&M very much so its really tough for me to decide which of the two engineering fields I'll like more. Whichever field I pick, I am also planning to minor or double in Physics and Computer Science. In terms of career interests, I am very much interested in the renewable energy sector, particularly solar and nuclear fusion. What would be the roles of these two engineers in these renewable energy fields? Which engineer would be more in demand? Which engineering branch has greater scope for breakthroughs?