question: What does a hole over Antarctica cause?
choices.text: Global warming air pollution Cold weather religion erosion change an ecosystem destroyed crops patch
choices.label: A B C D E F G H
fact2: Ozone depletion causes global warming.
combinedfact: a hole over antarctica causes global warming
formatted_question: What does a hole over Antarctica cause? (A) Global warming (B) air pollution (C) Cold weather (D) religion (E) erosion (F) change an ecosystem (G) destroyed crops (H) patch