The question Antal poses is when will climate change feel immediate enough for us to think and act decisively on behalf of future generations? He argues that we've developed an "environmental generational amnesia," and that we need to think long term in both directions. Thus, he includes a useful history of climate science and of our evolving understanding of the problem. This runs from the 1850s, when John Tyndall first suggested that CO2 created a greenhouse effect, trapping the sun's energy and warming the climate, to Wallace Broecker's groundbreaking research and climate projections in the 1970s, to Bill McKibben's landmark 1989 book, "The End of Nature," and leading up to the policies of the Trump administration.