1.Smoking … your health. (dangers, endangers) 2.Greenpeace works to … awareness of the dangers that threaten our planet todaypromote, 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)