Congrats on your Euro exam grade!
I am not an admissions expert, just a parent. But, my understanding is that most selective colleges (and often state flagships) will be looking for the normal science courses of bio, chem and physics, just to start with, before you even get to APs. AP Environmental would be an elective and as far as I know, tends to be viewed as one of the somewhat less-rigorous APs. At my kids’ school, Honors Chem is a prerequisite to AP Chem. AP Chem has a reputation for being one of the more difficult APs. While taking AP Chem would certainly satisfy any college’s desire to see chemistry, it doesn’t make sense to take AP Chem when you fear honors chem…as in the old saying, from the frying pan into the fire. Definitely check the prerequisites for AP Chem at your school.
A few older discussions for your review:
http://talk.collegeconfidential.com/college-admissions/1846939-did-not-take-chemistry-or-physics-in-high-school.html
http://talk.collegeconfidential.com/high-school-life/1986286-how-necessary-is-it-to-take-chemistry-in-high-school.html
From the second link, quoting @skieurope