Question this week (apart from the location): what is going on here (the dot-pattern)?
You can click the picture for a larger version
This used to be the place where Rio de Janeiro dumped its waste. It is the largest landfill in Southern America and one of the largest in the world.
Note: I prepared this contest on wednesday, June 6. On the same day Google Earth updated the imagery of this site, which I did not notice until some of you alerted me when the contest was live.
To give everyone a fair chance, I decided not to update this contest with the new imagery.
Those who dumped their waste
– Hint –