Taxonomy term

william f. ruddiman

Geomedia: Books: Earth faces challenges, but are they tipping points?

The 2016 book, “Tipping Point for Planet Earth,” by paleoecologists Anthony D. Barnosky and Elizabeth A. Hadly, is a serious book on a serious topic, and a well-written, one-stop resource for anyone who wants to understand a host of looming problems. The book focuses on the alarming number of worrisome planetary trends now underway, mainly as a result of the convergence of population growth and human-induced global warming. Chapters cover people (population growth), “stuff” (increased purchases of material goods), storms, hunger, thirst (failing water supplies, clean or not), toxins, disease and war. These trends have merited serious attention from environmental scientists and deserve the same from politicians. Whether they are tipping points, however, is a point of contention.

27 Jul 2017

Comment: How long have humans been altering Earth's climate?

The early anthropogenic hypothesis holds that greenhouse gas emissions from agriculture, as early as 7,000 years ago, kept the Holocene climate warmer than it otherwise would have been.

08 Apr 2016