He argues that "exhaustible" resources are actually plentiful. For instance, he points out that aluminum makes up 8% of the earth's crust, making claims of its total exhaustion mathematically improbable.
The text identifies multiple "virtually eternal" energy sources—such as solar, geothermal, and nuclear fusion—that could sustain a much larger global population at lower costs than today's fossil fuels. The next 200 years: a scenario for America and ...
Kahn categorizes worldviews into a spectrum to explain why some are so pessimistic while others remain hopeful: Kahn categorizes worldviews into a spectrum to explain
Kahn suggests that massive projects, like efficiently farming the Ganges basin or greenhouse farming in the Sahara, could produce enough food for 15 billion people. The Four Perspectives on the Future The next 200 years: a scenario for America and ...
Kahn posits that the period from 1776 to 2176 represents a unique 400-year pivot in human history.