What is Earth Day?

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Across
  1. 2. What helps to take carbon dioxide out of the air?
  2. 5. What are the three R's?
  3. 8. Who was the American Senator who came up with the idea of Earth Day?
  4. 9. What occurred in 1969 that prompted the idea of Earth Day?
  5. 10. What is in danger of melting that would cause sea levels to rise and lead to loss of habitat?
Down
  1. 1. What day does Earth Day take place each year?
  2. 2. Around how many Americans showed their support on the first ever Earth Day?
  3. 3. What has caused global temperatures to rise to dangerous levels, resulting in climate change?
  4. 4. What is climate change sometimes also referred to as?
  5. 6. What should we eat less of to help prevent global warming?
  6. 7. What are species in danger of due to climate change?
  7. 11. What type of pollution is a serious issue because it doesn't decompose?