Spread Certificate · No. HIS-01076
This certifies how far it spread
Earth Hour’s first global replication
WWF / Earth Hour ·March 2007 ·seeded onOpen webthenPress
Spread Score
40
Notable
Verified independently
Verified
2 outlets
National press, from Los Angeles Times / John M. Glionna and Wired
Verified
12 months
Seed to milestone, Mar 31 ’07 to Mar 29 ’08
Verified
2 platforms
Started on Open web
Claimed, not audited
Claimed
2.2M
Sydney participants, owner estimate
Per WWF Brasil
Claimed
371
Participating cities, 2008; WWF count
Per WWF Brasil
Claimed
88
Participating countries, 2009; WWF count
Per WWF Brasil