Do I go Physics, Chemistry, or Engineering???? Boy, do I need some insight if any are willing and serious. I'm a 34 y.o. married nurse(assoc degree), wife, and mom who has been seriously considering a career change for the past year. I want to figure out how things work to help our environment. I love learning about solar, wind, hydropower energy, geothermal energy. I'm not, however, good at tinkering and building things. I live near the steel mills where alot of coal-burning takes place. Where do I start??? Thanks!!!