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Starting in 2007, Earth Hour raises awareness of climate change on all major social media sites to encourage people to turn out non essential lights for one hour -
Sites like Facebook and Twitter played a critical role in organizing protests and raising awareness. -
A fundraiser campaign popular on Facebook and YouTube in which people dumped ice cold water on themselves to raise awareness for amyotrophic lateral sclerosis (ALS) -
Twitter and Instagram campaign in Nigeria demanding action against the Boko Haram -
Trumps use of Twitter and bots on Facebook greatly impacted the outcome of the 2016 presidential election