19 - Derretimento das calotas polares
1Cause
2Consequences
Freshwater coming from the melting of Greenland may threaten the thermohaline circulation.
1Other possible cause
It's a bit technical, but the blue part of the map of Antarctica on card 19 represents a gain in mass due to an increase of precipitations. The red part represents a loss in mass. In total, Antarctica is losing mass.