Frequent viewers of South Park, Comedy Central's highest-rated program, know the animated series is famous for taking current events and standing them on their heads. Its use of satire to make a point is legendary — and environmentalism is regularly lampooned, as are religion, politics, Hollywood and other topics.

Obviously, the environmental movement deals with some serious themes and implications, so it's important to take a step back every now and again to make light of what's otherwise a bleak topic. In that respect, let us now present to you the top five green-themed South Park episodes: 

5) "Rainforest Shmainforest" | Season 3 | Watch Online

This hilarious episode features the boys of South Park traveling with an environmental choir called "Getting Gay With Kids" to Costa Rica. Miss Stevens (voiced by Jennifer Aniston) is the leader of the group and urges everyone to "take only photos and leave only footprints" and other green clichés. In the end, chaos ensues and the group ends up collectively hating the rain forest and its inhabitants.

Best line: "Wow, dude, bulldozers rule!"

4) "Terrance and Phillip: Behind the Blow" | Season 5 | Watch Online

Earth Day is coming to South Park — the National Earth Day organization has chosen the town to be the location of its Earth Day Brainwashing Festival. In order to get more kids to tune in and love the Earth, the organizers tell the boys that they must bring television stars Terrance and Phillip to South Park to perform. The treehuggers get violent when things don't go according to plan. 

Best line: "Nothing matters more than saving the planet from Republicans."

MORE: Watch the top three green South Park episodes >

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Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.