Q: Given a scientific passage and an answer, generate a question for the given answer.
Passage: Plants maintain the atmosphere. They produce oxygen and absorb carbon dioxide during photosynthesis. Oxygen is essential for cellular respiration for all aerobic organisms. It also maintains the ozone layer that helps protect Earth's life from damaging UV radiation. Removal of carbon dioxide from the atmosphere reduces the greenhouse effect and global warming. Answer: uv radiation
A:
The ozone layer protects the earth from what?