If you don't already know about them, Coursera offers free online classes on a variety of subjects - many at the university level. To find out more about Coursera, here's a link to their About page.
I was perusing their offerings today and found the following: Energy, the Environment, and Our Future taught by Penn State professor, Richard B. Alley who did research for the PBS series: Earth, the Operator's Manual. The class started Jan 6th but I signed up to receive notification when the next session comes out.
Here's a video intro to the course.
Subtropical desert (Köppen: BWh)
Elevation: 1090 ft Annual rainfall: 7"
Create symphonies in seed and soil. For this tiny ad: