South Park (1997)

S22E6 Time to Get Cereal

It turns out that everyone in South Park should have heeded Al Gore's advice. The townspeople remain blissfully unaware of the peril they face. As the number of deceased locals starts to rise, the boys come to the conclusion that they need Al Gore's assistance. They're ready to go to great lengths to protect the town and themselves, but they might already be running out of time.