"WE ARE THE FUTURE GIVE US A CHANCE"

That was the message of one poster placed next to Sweden's Aletsch Glacier. This was only one of 125,000 drawings and messages about climate change, which were created by children from all over the world. The mosaic is the largest in the world; it measures 2,500 sq m (26,910 sq ft). Seen from above, the whole picture reads: "STOP GLOBAL WARMING #1.5 DEGREES C".