Mike Rea latched onto the release of a Hollywood film on the 2004 tsunamis in Asia to help spread his message about how to effectively support charities engaged in disaster relief.
SELCO founder Harish Hande set out to dispel the myths that poor people can't afford or maintain solar technologies.
The drought that has hit the United States and other grain-producing nations could be global warming or just a one-season aberration. But while weather fluctuates year to year, global population doesn't. And that means that feeding 9 billion mouths by 2050 will require unprecedented effort.