South Bend Mayor Pete Buttigieg’s campaign explained to Fox News host Tucker Carlson that the Democratic presidential candidate flies commercially as much as possible, unless his schedule dictates otherwise.

Carlson characterized Buttigieg as a hypocritical moralizer during his Thursday night show, playing a clip of Buttigieg claiming during CNN’s climate town hall that God is displeased with mankind because of pollution. “If you believe that God is watching as poison is being belched into the air of creation, and people are being harmed by it — countries are at risk of vanishing in low-lying areas — what do you suppose God thinks of that?” Buttigieg asked the audience. “I bet he thinks it’s messed up,” he added, before going on to characterize pollution as “a kind of sin.”