Oil traders like Trafigura blend cheap fuel with sulfur levels 100x over European limits. They sell the "dirty diesel" in African countries where the weakness of local fuel standards can be exploited. The Swiss NGO Public Eye published a report about the dirty business.
To show the shocking impacts dirty diesel has on the African population, their agency created a unique campaign. With the help of activists in Ghana, they shot a short film showing local people capturing the polluted air with canisters and return it to the sender.