Ruby 10: stop felling trees

1. negatively ✓
2. all have a responsibility to care for the environment ✓
3. carbon dioxide from the air and produces oxygen ✓
4. oxygen to breath ✓
5. backyard tree fellers are selfish and short-sighted ✓
6. no oxygen cycle ✓
7. the unnecessary felling of trees should be banned ✓
8. essential ✓
9. a debate x
10. people will be more aware ✓
11. essential to life ✓
12. trees ✓