"Let's save our planet": HTML5 Crossword

Across

4. An animal or plant species in danger of extinction (10,7)
6. rise in temperature of the earth's atmosphere, caused by an increase of gases (10,6)
7. Substances that make air, soil and water dirty (9)
8. climat (7)
9. émissions de carbone (6,9)
10. Environnement (11)
13. réchauffement climatique (6,7)
15. mode veille (7,4)
16. use again (7)

Down

1. to add dirty or harmful substances to land, air, or water (7)
2. gaspiller (5)
3. tri sélectif (9,7)
5. économiser (4)
11. the natural world in which people, animals and plants live (11)
12. ampoule (4)
14. menacer (8)