1. RISK:
U.S. hit with 90% of the world's disaster costs in 2012
The United States led the world in disaster losses last year as a massive drought seared Midwestern crops in the field and as superstorm-driven waves wreaked havoc and blackouts along the East Coast. They added up to one of the most expensive weather damage years on record. Go to story #1
Climate change is high on his to-do list.