Ageing/Politics -the new "Elders" club set up by Nelson Mandela plans to use its "almost 1,000 years of collective experience" to tackle crises governments are unable or unwilling to confront.
Consumption - consumers in developing countries are concerned about global warming, but not enough to forsake the luxury of owning a car or other perks of being rich.
Energy -as emerging economies grow, they often face power constraints. Part of the solution might be an "electranet”, a flexible, adhoc structure that would allow power producers to spill excess power onto a network and sell it.