A situation which occurs when the number of occupants of an area exceeds the ability of that area to provide for those occupants
The situation when an animal, plant, or language no longer exists
ECOLOGY
An increase in the near surface temperature of the Earth.
The process of damaging the air, water, or land with chemicals or other substances
The work of cutting down trees for their wood
ANIMAL MISTREATMENT
OZONE LAYER
Any substance used in or resulting from a reaction involving changes to atoms or molecules
The protective layer in the atmosphere, about 15 miles above the ground, that absorbs some of the sun's ultraviolet rays.
To treat animals in an unfair or cruel way
OVERPOPULATION
CUT DOWN
GLOBAL WARMING
LOGGING
To reduce the size, amount or number of something
POLLUTION
The study of the relationships between living organisms and their environments.
ENVIRONMENT
EXTINCTION
CHEMICAL PRODUCT
The air, water, minerals, organisms, and all other external factors surrounding and affecting a given organism at any time.
