Environmental activists flooded a panel event at the U.N. climate summit to protest the Trump administration’s promoting of fossil fuels and nuclear power.

Activists sang their own version of country music star Lee Greenwood’s “God Bless the U.S.A.” to protest a Trump administration even promoting technologies to cut carbon dioxide emissions from fossil fuels. Greenwood performed his hit song at President Donald Trump’s inauguration celebration.

Axios’s Amy Harder caught activists singing “so you claim to be an American, but we see right through your greed” to the tune of Greenwood’s song, ultimately urging officials to “keep it in the ground.”

Some activists had their hands over their hearts, maybe mistaking this for the U.S. national anthem. Protesters sang for nearly 10 minutes, according to Harder.

White House energy adviser George David Banks held an event at the U.N. climate talks in Bonn, Germany, Monday to discuss what role fossil fuels and nuclear power could contribute to cutting emissions.

Panelists for the Trump administration event took their seats after protesters had left the room. Panelists included, coal and nuclear energy executives and President Barack Obama’s former energy envoy Amos Hochstein, who now works for a natural gas export company.

Hundreds lined up for the event, eager to hear the Trump administration’s plan for cutting carbon dioxide emissions outside of the Paris agreement on climate change. Trump announced in June the U.S. would withdraw from the Paris accord.

Activists with 350.org and Climate Action Network vowed to protest the event. Seems like they were successful in doing that.

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This article originally appeared in The Daily Caller