Wells Griffith, President Donald Trump’s adviser on energy and climate, made quite an impression at this year’s largest climate change conference held in Poland when he used his speaking time to bolster the necessity of coal.

According to a Washington Post report, Griffith took the podium Monday and said, “We strongly believe that no country should have to sacrifice economic prosperity or energy security in pursuit of environmental sustainability.”

The room erupted into laughter, punctuated with shouts of protest.

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Read more: The Trump Admin Gets Laughed At Over Climate: A New End-of-Year Tradition (Prime access)