Ash from what volcano, when it erupted in June 2011, grounded flights in Chile, Bolivia, Argentina, Uruguay and Paraguay and disrupted air traffic over Australia and New Zealand?
In the centre of South America, spread across Brazil, Paraguay, and Bolivia, there is an extensive wetlands known as what?
The 10 national CONMEBOL teams come from Chile, Peru, Colombia, Ecuador, Venezuela, Argentina, Brazil, Paraguay, Uruguay and which other?