Earth Day Crossword Puzzle

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Across
  1. 2. Which President signed the Paris Agreement?
  2. 5. Who is credited with founding Earth Day?
  3. 8. When is Earth Day?
  4. 10. When did Earth Day start to be celebrated Globally
Down
  1. 1. What region on Earth produces 20% of the planet's oxygen?
  2. 3. Most of Earth's breathable air comes from where?
  3. 4. A single tree produces enough air to supply in its lifetime for how many people for a year?
  4. 6. In 1970, students at Florida Technological University held a mock trial for what, accusing it of air pollution?
  5. 7. How many countries (so far) have celebrated Earth Day?
  6. 9. was the second-hottest year on record worldwide?