Majored in Environmental Science; while it's not useless with respect to finding work, I feel that something like Chemistry would have had similar value for most of the same jobs, whereas Environmental Science is not valuable in all contexts that a major like Chemistry would have been.

Plus, it tends to lump me in with environmental activists, signalling-wise, while I am firmly of the opinion that if we actually want to solve most environmental problems, our solutions will have to be technological, not social.