Hydrogen is readily becoming a viable substitute for fossil fuels and currently a lot of cars and facilities are being built to run on Hydrogen, but the problem is that to get the Hydrogen gas into the correct state for use as an energy source (usually needs to be a heavily compressed and refined liquid), it takes a lot of energy to do so. So basically they're using tonnes of fossil fuels to make cleaner energy; it's a vicious cycle! D: The dolphins thing sounds cool though, I'd love to be able to talk to animals and find out how they feel about the human race and what we're doing to their habitats. Plus come on, how cool would it be to tell people you had a conversation with them? xD
So Zoology and Animal Biology... I suppose that pins you as a vet? Zoologist? Breeder? Animal husbander? :)