Climate change is not humanity's greatest challenge (even though scientists predict it may unleash public unrest, cross-border conflicts and mass migration in 20 years, and increase the global surface temperature up to 11.5 degrees Fahrenheit by 2100).
Neither are pandemics, nuclear proliferation, water scarcity, the Middle East conflict, or many...
2 Comments | Posted May 19, 2009 | 10:29 AM (EST)