In an interview on UStream, Mr Gore likened the debate over climate change to the Civil Rights movement in the US in the 1960s.
He said that in order for climate change advocates to secure action over global warming they must "win the conversation" against deniers.
"I remember again going back to my early years in the South, when the Civil Rights revolution was unfolding, there were two things that really made an impression on me," he told Climate Reality Project collaboator Alex Bogusky.
"My generation watched Bull Connor turning the hose on civil rights demonstrators and we went 'Woah! How gross and evil is that?'."
He remembered how society marginalised racists and said climate change sceptics must be defeated in the same way.
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