|
endangered
species
|
a
species of plant or animal that is in danger of becoming extinct.
|
| evolution
|
the
continuous modification and adaptation of organisms to their environments
through selection, hybridization, and the like. |
| extinct |
no
longer existing, as an animal species. |
| greenhouse
effect |
the
warming trend on the surface and in the lower atmosphere of a planet,
held by scientists to occur when solar radiation is trapped, as
by emissions from the planet. |
| habitat
|
the
natural environment of a plant or animal. |
| insecticide
|
a
substance used to kill insects. |
| atmosphere
|
the mass of gases surrounding the earth or any other celestial body.
|
| ozone
|
oxygen
in the form of molecules with three atoms, created by exposure of
oxygen to electrical discharge or ultraviolet radiation, having
a sharp smell, and being an effective oxidant for use in bleaching
and sterilizing. |
| poacher
|
one
who illegally hunts on another's property. |
| pollution
|
contaminating
material that pollutes. |
| smog
|
a
haze caused by the effect of sunlight on foggy air that has been
polluted by vehicle exhaust gases and industrial smoke. |
| biosphere
|
the part of the earth and its atmosphere in which living organisms
can exist. |
| conservation |
the
act of preserving and protecting from loss, destruction, or waste. |
