HBO host Bill MaherWilliam (Bill) MaherMichael Moore: The only way Trump wins in 2020 is if he 'cheats' Maher to Tara Reade on timing of sexual assault allegation: 'Why wait until Biden is our only hope?' Eric Holder defends Biden: Allegation 'inconsistent with the person who I've come to know' MORE said Friday that he is “glad” billionaire conservative activist David Koch is dead, adding, that he hopes “the end was painful.”

“Yesterday, David Koch, of the zillionaire Koch brothers, died of prostate cancer. I guess I’m going to have to reevaluate my low opinion of prostate cancer,” Maher said, drawing laughter during his show, “Real Time.” “He was 79, but his family says they wish he could live longer, but at least he lived long enough to see the Amazon catch fire.”

"Condolences poured in from all the politicians he owned, and mourners have been asked in lieu of flowers to just leave their car engines running," he said, pausing to applause. "As for his remains, he’s been asked to be cremated and have his ashes blown into a child’s lungs," Maher quipped.

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Koch, who, along with his older brother, was a formidable conservative activist and donor, died Friday morning at age 79 after being diagnosed with prostate cancer more than two decades ago.

“He and his brother have done more than anybody to fund climate science deniers for decades, so f--- him. The Amazon is burning up. I’m glad he’s dead, and I hope the end was painful,” Maher said.

The Koches are best known for their polarizing influence over American politics. They have been known largely for their massive political contributions to Republican candidates and libertarian-leaning causes. Koch and his brother Charles poured millions into organizations and causes to stop mobilization around climate change and environmental research and legislation as well as public transit initiatives.

The Koch network has lent a hand to many Washington figures, including to Vice President Pence, Secretary of State Mike PompeoMichael (Mike) Richard PompeoFormer British governor: China has betrayed Hong Kong The other dangerous virus infecting our country Hong Kong police fire tear gas at pro-democracy demonstrators MORE and Sen. Joni ErnstJoni Kay ErnstIowa Democrat tops Ernst in early fundraising report EPA's Wheeler grilled by Democrats over environmental rollbacks amid COVID-19 The Hill's Coronavirus Report: CDC Director Redfield responds to Navarro criticism; Mnuchin and Powell brief Senate panel MORE (R-Iowa). In the 2016 election cycle alone, it spent nearly $900 million, almost matching what the entire Republican Party spent on candidates that year, according to The Washington Post.