3.5
informative medium-paced

Reading this as an audio book may have been a mistake for two reasons:
1. It wasn't narrated by it's author, a podcast host. *sigh*
2. I had a hard time listening to the many scientific names of the plants (and their descriptions) which would have worked better for me in a print format +/- illustrations or photos. 

It was still a nice non-fiction exploration of plants with a rousing call to arms to defend them.