Take a stroll outside, and you will find various trees and their leaves along the sidewalk. Leave a piece of bread out and you might find it quickly invaded by insects. Whether you like seafood or not, chances are, you have heard of the famous Maryland blue crabs. No matter where you look, you will always find nature as a large part of our lives. In this course, we will take a closer look at the natural heritage of Baltimore: how it had changed; how it will continue to change; and how it would affect all of us?