Bill and Melinda Gates Foundation

1.5 million children die each year from preventable diseases arising from poor sanitation systems. That’s why some of the world’s top scientists are working to make a 21st-century toilet without links to water, energy, or sewer lines, and which costs users under $0.05 a day.

Bill and Melinda Gates lay out the key accomplishments of their philanthropic foundation in response to Warren Buffet.