Comedian Bill Nye “The Science Guy” said Wednesday that the climate change movement can only move forward once the older generation begins to die off.

“Climate change deniers, by way of example, are older. It’s generational,” Nye told the Los Angeles Times in an interview. Nye added that he shouldn’t be too hard on older citizens, however, because he is “now one of them.”

“We’re just going to have to wait for those people to ‘age out,’ as they say,” Nye said, adding that “age out” is a euphemism for dying. “But it’ll happen, I guarantee you — that’ll happen.”

Nye used the interview to pitch his newest book, “Everything All at Once: How to Unleash Your Inner Nerd, Tap into Radical Curiosity and Solve Any Problem,” which lengthily discusses climate change, among other issues.

The former children’s show host has also received plaudits from Hollywood for his newest television show, “Bill Nye Saves The World.”

The Television Academy Awards nominated the show’s writers earlier this month for an episode suggesting that sexuality exists on a spectrum. The episode raised concern from conservatives and YouTube denizens alike, many of which mocked the show for awkwardly associating social sciences with physical sciences.

The nominated episode contains the music video, “My Sex Junk,” which aired in April on Netflix, featuring actress Rachel Bloom singing a song about transgenders, gay sex and how sexuality is a fluid concept. Bloom’s song appears to lament the fact that humans are relegated to living lives as male or female.

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