In what ways is Coca Cola a corrupt organisation?

For part of my Geography A-level we have to look at Coca Cola under the topic of Globalisation, as it is the worlds largest and most well known TNC.
Just wondering to know if any people know anything that Coca Cola has done to make it be labelled as corrupt by some people. I know quite a few already, just want to know more so that I have more points to write.
Thanks.