With a commitment to the understanding of these challenges and strategies related to protecting the environment I look forward to my studies at the George R. Brown School of Engineering.
Yes, I was thinking that this sentence needed a comma, and I notice that Paulina added one.
What you said about Houston is convincing, but the rest of the essay is rather general. I think you should come up with a memorable theme -- and, for example, if you are feeling creative, you can give the reader something to see. Give a sentence that lets them see what you saw in Peru.
I hope you'll use some imagery in para #1 and suggest a theme... and then tell all about why this school is perfect for your unique interests in para #2... and then give a conclusion that mentions the theme again in para #3.
What is the theme of the essay, the moral of the story?