The advantages are between learning Latin or Greek is rather relative. If you have no interest in ancient Greek philosophy, culture, or history, there is no point in learning ancient Greek (maybe to read the original Greek Bible text, but that was written after the language evolved a bit). Latin on the other hand is more versatile and has more purpose outside of philosophy. But within philosophy, if you do not have an interest in Medieval philosophy, Descartes, Spinoza, or a handful of others, there is not much reason to learn Latin. I can tell you from my experience with ancient Greek that it is an impossible language, and if we were speaking and writing the language, most people would have a hard time comprehending anything complex because of the steep learning curve. From my classmates and professor's experience I can tell you that Latin is far easier to learn. I am actually going to pick it up this summer, for fun and to eventually read Spinoza.
I think my draw to ecological philosophy and the philosophy of geography is due to my interest in ethics and politics--along with my strong interest in the environment. It gives me a way to apply what I have learned in my studies towards practical issues.