A new study establishes that soda consumption is doing ever more damage to health — with rising rates of diabetes in regions where soda-drinking is on the rise, like sub-Saharan Africa.

How did the soda giant from America come to be seen as "local" in Africa? And what has the impact been on the continent for worse and for better?

Soda taxes are meant to discourage people from drinking too much sugar, which is linked to a host of bad health outcomes. Cities that imposed the taxes saw a 33% decrease in the sale of sugary drinks.

As the marketing of soda and fast food ramps up around the world, the companies involved forge partnerships to help the poor. The new book 'Junk Food Politics' casts a critical eye at their efforts.

"The damage of this kind of diet is even more visible because of the pandemic," says a Oaxaca legislator who spearheaded a law against the sale of junk food and soda to minors. The idea is spreading.