Former Vice President Al Gore said Friday that climate change is making Hurricane Florence, and other extreme weather events, more destructive, and criticized people who “deny the reality.”

“Every night on the television news is like a nature hike through the Book of Revelation and we’ve got to connect the dots between the cause and the effect,” Gore said during a speech at the Global Climate Action Summit in San Francisco, where about 4,000 city, state, business, and world leaders gathered to demonstrate their will to combat climate change.