Ecology
Very close to the point at which something new, often something exciting or dangerous, is about to begin
On the brink of
Used especially of plants and animals which are danger of being made extinct
Endangered
The act or process of causing something
Pollution
The natural surroundings in which a plant or animal usually lives
Habitat
To control something by the use of rules
Regulate
The cutting down or burning of trees
Deforestation
The making extinct of something
Extinction
A chemical substance that is used to kill pests
Pesticide
To kill it destroy completely
Wipe out
To change something completely so that it's the opposite of what it was
Reverse
The relationship between human, animal and plant life
Ecology
No longer existing
Extinct
To cause something to be dirty
Pollute
On a large scale, affecting a great many people or things
Wholesale
To destroy somewhere completely
Lay waste to
Relating to ecology or to the environment
Ecological
The gradual development, especially of living things
Evolution
Poisonous substance
Toxin
To continue to live or exist
Survive
A group into which animals or plants are divided
Soecies
All the living creatures and plants in a particular area
Ecosystem
Connected with evolution
Evolutionary
Animals, birds and insects which live in their natural surroundings
Wildlife
The act or state of surviving
Survival
Official rule
Regulation