Chantal Laurin - QC, Canada

Wonderful 10cm and 2.5cm works.  Cool idea for a way to send them too.  Thanks very much Chantal!

Roberto Keppler - Brazil

Roberto, I do know of Sao Paulo.  I hear it is one of the largest cities in the world.  Particulate matter levels tend to be higher in the winter everywhere.  The cold, still air, low inversion layer, and people using their fireplaces makes Winter the 'high PM season'.  How is the air there in Sao Paulo typically speaking?