Pope Francis has those old global-warming blues.

Some Catholics are criticizing Pope Francis for his stated positions on environmental issues. On April 28, a Vatican conference on environment and migration commenced that brought scores of business people, activists, and Catholic officials to the ancient city.

Among them is Jeffrey Sachs – a wealthy and influential economist who has sometimes been accused of leftist leanings.Also on hand is UN Secretary General Ban Ki-Moon, who had a private meeting with the pontiff.

The conference and Pope Francis’s previous statements on the environment inspired the ire, for instance, of writer Maureen Mullarkey.

Writing online in the journal ‘First Things,’ Mullarkey said “Francis sullies his office by using demagogic formulations to bully the populace into reflexive climate action with no more substantive guide than theologised propaganda.”