Your test scores and GPA are a positive for admissions.
Your interest in “green” issues - e.g. your interest in the proliferation of the lionfish species - fits right into the interests of students and academic departments at both the Emory College campus and the Oxford College campus.
A couple of years ago, an Oxford College student produced a film about his adventures in hunting lionfish, which won a prize at an international film festival:
http://news.emory.edu/stories/2015/12/er_oxford_student_film_award/campus.html
“A trip to Honduras during high school introduced Preston Buchanan, now a first-year student at Emory’s Oxford College, to an environmental problem plaguing the region — and inspired him to create a film that recently earned international honors.”
One question that may have been answered in your counselor’s letter is why you didn’t take the AP versions of physics, English, Spanish, psychology. Presumably your school doesn’t offer them?