Iconic landmarks around the world turn out the lights for Earth Hour 2016 | Risques du monde d'aujourd'hui et du "monde d'après" : changement climatique, pollution, santé, modes de vie, démographie, crises sociales, cyber......) | Scoop.it
From mashable.com - March 20, 2016 4:37 AM
On Saturday night, homes, businesses and landmarks around the world turned off their lights for 60 minutes.

Via Hubert MESSMER