South Park S03 E01 Rainforest Shmainforest

"Four boys. One f**ked-up town."

Mr. Mackey punishes the boys by forcing them to join the "Getting Gay With Kids" choir. The choir is going to Costa Rica to help save the rainforest. While on a tour of the rainforest the choir group gets lost when a snake kills their guide. They soon discover the evils of the rainforest, which changes the choir group's message.