This book contains a collection of essays and articles by John
Scales Avery discussing the severe problems and challenges which
the world faces during the 21st century. Human civilization and the
biosphere are threatened by catastrophic climate change. Unless
rapid steps are taken to replace fossil fuels by 100% renewable
energy, we risk passing a tipping point beyond which uncontrollable
feedback loops could produce a 6th extinction event comparable to
those observed in the geological record. Another serious threat to
human civilization and the biosphere is the danger of a
catastrophic thermonuclear war. Over a long period of time there is
an ever-increasing risk that such a war will occur by accident or
miscalculation. Thirdly, there is threat of an extremely serious
and widespread famine, produced by the climate change,
rapidly-growing populations, and the end of the fossil fuel era. We
must urgently address all three challenges.
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