What should I study in college?

Physics and chemistry are good. So is engineering, except that there are several branches of engineering. If you think only of better energy sources and enhancing the ones already in place, you will never get through college. You must take chemistry, physics, and engineering courses to see where you fall in love. When you fall in love, you will pursue that major through to the end and accomplish what you want. If you do not fall in love, you will not get through college, and you will not develop or enhance any thing.