1. smoking … your health. (dangers, endangers)
2. greenpeace works to … awareness of the dangers that threaten our planet today.(promote, improve)
3. apes are on the … of extinction (edge, verge)
4. losing twenty million acres of tropical rain forests every year is a …. (disadvantage, disaster)
5. tigers are … and killed for their body parts which are used in medicine. (hunted, haunted)
6. oceans are currently a big dumping ground for tons of toxic… and sewage. (waste, packing)
7. there are no more than two hundred and fifty … of sharks in the world.(species, kinds)
8. storms and heavy rains often cause great … to property. (damage, loss)
9. some factories and plants … poisonous substances into the atmosphere.(increase, release)
10. people are not doing their best to … an ecological catastrophe. (avoid, prevent)