Al Gore continued his criticism of climate change skeptics in an interview with Climate Reality Project collaborator Alex Bogusky on UStream, going as far as to compare them to the racists of the 20th century.

"There came a time when racist comments would come up in the course of the conversation and in years past they were just natural," Gore said. "Then there came a time when people would say, ‘Hey, man why do you talk that way, I mean that is wrong. I don’t go for that so don’t talk that way around me. I just don’t believe that.’ That happened in millions of conversations and slowly the conversation was won. We have to win the conversation on climate.”

When asked by Bogusky about Rick Perry's recent comments against climate change, Gore focused on not just the Texas governor, but the entire anti-science movement.

“This is an organized effort to attack the reputation of the scientific community as a whole, to attack their integrity, and to slander them with the lie that they are making up the science in order to make money,” Gore said.

"These scientists don't make a lot of money. They're comfortable as they should be, but they don't make a lot of money. It's not in their nature to get ready to constantly defend themselves against political attacks. That's not want they expected to be doing in their lives."

WATCH: Video from UStream, which occurred on August 27, 2011.