In honor of the upcoming worldwide commercial-free broadcast of Before the Flood, the new documentary from Academy Award winners Leonardo DiCaprio and Fisher Stevens exploring the global effects of climate change, 21st Century Fox and National Geographic have launched a new social media campaign to drive support for the conservation of endangered wildlife and ecosystems. For every use of the hashtag #BeforeTheFlood across Facebook, Twitter and Instagram, as well as the Before the Flood custom Snapchat filter from October 24 to November 18, 21CF and National Geographic will together donate $1 to Pristine Seas and $1 to the Wildlife Conservation Society for a grant total of up to $100,000 ($50,000 to each organization).