Intriguing, but at times choppy sentences and an assumption that the reader has previous background knowledge of the time period and/or the people being discussed.  I was also concerned given the subtitle that there were no footnotes, bibliography sharing/supporting Lipsky's research & writing, etc. 
I might try to go back to it again, but may also try other books on the topic such as, Not Too Late: Changing the Climate Story From Despair to Possibility by Rebecca Solnit; Under the Sky We Make: How to Be a Human in a Warming World by Kimberly Nicolas, PhD.; and Under a White Sky: The Nature of the Future by Elizabeth Kolbert.