Not too easy. Not too difficult.
As a general requirement this course isn't too bad. All you have to do is write 4-5 responses each week based on lectures and should really only take like 6ish hours a week. However, the title is completely misleading. There is only one week of the 6 week course that is about biology and it's not even environmental or organismal. The whole class is based around critically thinking about science and creating short paragraphs about a prompt or a lecture you were given. So if you like science, take the course, but if not, stay FAR away.
I would struggle to name one thing I learned while in this course. Only take it if you need to.
Hours per week:
Advice for students:
If you're going to take it online try to setup a way pace yourself because the professor (Dr. Noll) hardly posts at all and it's very easy to just forget about the class entirely.