That's what this project is called. Originally the creator didn't reveal the color codes for this infographic, saying the viewer can pretty much guess the corresponding issues and continents on his/her own.
Blue: Oceania (Australia and its proximate islands)
Obesity, Coka-Cola, and McDonald's exist mostly in the Americas (big surprise), while the majority of the world's population, billionaires, and pollution are in Asia. And most of the world's HIV sufferers, guns, and Catholic priests? More here.