Power
"Alice! Cancel all my appointments. There's wildlife to rescue, and those beavers can't be kept waiting!"
Okay, so you probably won't be saying anything like that anytime soon. Wildlife rescuers don't really have a lot of power—at least, not in the traditional sense. You won't be deciding the fate of nations, and you won't be overseeing large groups of staff or introducing new product lines at hushed shareholder meetings.
Instead you'll be working in small teams with equally dedicated fellow rescuers. You'll either be working independently, or through a wildlife shelter or refuge. Because of this, you won't really get to boss anyone around, except maybe the animals and the occasional volunteer.
However, just because the fate of nations won't rest on your shoulders doesn't mean your decisions won't matter. After all, this line of work involves making life-or-death choices every day. You have the power to administer emergency care to wounded animals, to help those animals get back to shelters or rehabilitation centers and restore them to health. You help living things keep alive.
Whoa. And if you're working in disaster relief (like after an oil spill), you may even help entire ecosystems recover, playing an integral role in restoring a blighted area of forest or coastline.
Are you going to be scheduling meetings with the president? Nope, but you'll have a very real impact anyway.